十七國民豪中
·育日四初月正年巳己麼
urn of the
together to try to find their
and original parents,
̇報日僑
(a) Adult
-四期星 日九月二九八九一)年八十七國民業中( 241
iii. (1) Where does mosquito Tay
Parents
x Bb
had
ween central
inevitable.
ernment, the
tempted ilways.
to
narrowed the search to four
possible couples:
Couple 1.
1ts eggs?
a large (2) Explain why number of eggs are laid each time.
Gametes
B.b
8, 5
one had type A blood, the
other types B;
(d) Pusa
MILL & DALE PRESS
Breathing
Lube
(b) Eyg
The graph shows the growth pattern of the larva. Explain the growth (1) at X and (2) at.Y.
e provinces Iterests by by protection
vernment made tionalization
it the Qing ge loans from
a new wave Sm because it imperialists
xpand their
more people
nary society
ed the Qing China.
lan Uprising,
declared
rolution
s followed by
* independence
is provisional
vernment
to negotiate ics.
the new army,
ns with him in
war.
1. Qing emperor
1. and the
be a success.
ur of Yuan's
holes of the
de the early
haos.
of the 1911 way to the New May Fourth
1989 中學會考預習專欄
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Biology (19)
Genetics and growth
A Cheuk
1. Immediately after birth a set of triplets, two of whom were known to be identical twins, were separated" and reared under very different conditions. The table below shows data for the triplets at the age of 20.
Couple 2
both had type: AB blood;
Couple 31
one had type A blood, the
other type AB;
Couple 4
one had type 0 blood, the other type AB..
(1) which couple do you think were the parents?
(2) Give reasons for Your answer to (1).
Both parents were known to have brown eyes; Mary. has blue eyes. Assuming that the brown allele (B) is dominant to the blue allele (b), what
(c) Larva (wriggleri
A. Life History of the Mosquito
.Body. length
were the genotypes of
Height in a
MARY JUNE ELIZABETH 1.7811.78
(1) the mother and
Tiac
Weight in kg Blood group T.Q.
78 80 0 AB 135 1.40
1.74 86
(2) the father?"
3. The Growth Pattern of Wriggler
the
0
125
What is the probability that June has blue eyes? Explain
your answer genetic diagram.
by
means
of
Which two girls were identical twins?
Which characteristic shown in the table enabled you to answer (1)?
The thre
4. The three girls had got.
1989 中學會考預習專欄
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Physics (19)
2. The diagram below shows the life history of mosquito and the graph shows the growth
́pattern fif wriggler (larva of mosquito).
As shown in the figure
are two switches. Find of the ammeter. A when (alsk is closed and k
Reading
is
“and k, is open.
C.-Y.. Mak
{ck (d) k
are closed.
k are open.
it on the 1911
ve.
the causes and the May Fourth
amined in: next
25 as reserve money supply lese $75 are man who again. another, bank, 5-$18,75, and
by supply then If 'the same sly, the total
$100 x
0.25- amount of $100
Exercis 19 Electric circuit (2)
As shown in the figure, lamps B, and B2 are connected to a 30d.. supply. If the lamps are rated, 69. 24 and 12V, 36W respectively? Find the values of R. and R such that By and B2 will operate at their correct ratings.
30% d.c
12V 36
HO
3102
that
(1) Name the type of life. history...
mosquito undergoes.
(2) What is the advantage of this type of life history? Describe the feeding habits
'male of the
and female. mosquitoes, and account for their difference,
(c) Find the efficiency of the motor.
(d) What happens to the "energy wasted?
Solutions to Exercise
P.d. across A and B =P.d. across C and D = 12V
sures how many
n the basis of
eposit, and is.
of the reserve
Find the ratio of power dissipated
in R R and R in each of the
following diagrams.
-200
(a)
In x» Iliza -
R36012
As
P.d. across R1
= 12-6 = 6V
Current through R,
Current through B
24
4A
the
= 1.50 (Ans
P.d. across R
30-12
= 18V
shown in the figure, internal resistance of the ammeter
is 100 and that of the voltmeter is 2400 A.
(a) Find
the total resistance of the circuit.
(ii) the reading of the ammeter. (11) the reading of the voltmeter.
(b) if the voltmeter is removed, what would be the reading of the ammeter.
Current through B2 = 32
Current through R2
= 3A
*3A+4A
=2.570
¡Solution
With reference to the diagram only suggest with reasons,
efficient ways. to: eliminate mosquitoes.
two
1. (1) || Mary and Elizabeth.
(ii) Blood group.. [iii) (1) Couple 1."
(2) Mary and Elizabetfi have them blood group 0. Each of had to receive one recessive gene G from her father and one recessive gene o from her mother. June has blood group AB, therefore, she had to receive one dominant gene A from one of her parents and one dominant gene B from the other. Therefore, their parents had type A blood (40), and type B blood (80). [iy) (1) Bb.
(2) Bb.
(v) The probability that June has
blue eyes is 25%.
(b).
12R2 2011 = 3012
But
(4.512)?(20)
R1-200
2. (1)
88, 28b, bb,
(1) Complete metamorphosis. (2) Since the young and adult differ in form and feeding. habit, the competition for food and space can be avoided.
(11) The female sucks mammalian blood while the male sucks plant juice.
The female needs nutritive blood to produce its eggs. (111) (1) In stagnant water;
(2) A large number of eggs are produced to increase the chance of survival.
is the (iv) (1) At
body X, enclosed by a hard skeleton, so no growth can take place. (2) At Y, te exoskeleton has been shed away, so the bady is allowed to grow,
(v).
(1) A layer of paraffin or oil can be sprayed onto water. surface,
This can kill the Tarvae by preventing them from taking in atmospheric oxygen. (2) Draining the ponds, and vessels can Swamps destroy the ground for laying
egas.
B2-300
2400
45 30 375.
32 25 (Ans.)..
33
(a)
(1)
Let R
HAB
..(2)
1
(ii)
600
"AB"
equivalent resistance across A and B
t
600 + 2400
(600)(2400)
600+2400
*480n...
Total resistance
-310+480+10
8002 (Ans.)
800
= 0.25A (Ans.)
(a) when k, is closed, coccurre
through R
(iii) P.d. across A and B
(1) (RAR).
* (0.25)(480)
(Ans.).
18
= 7A
(Ans.)
PUBLIC
#
1 12 2A
(Ans.)
(b) when k2 is closed and ** is
open, R, and R2 are in parallel. Total resistance of the circuit
1.33A (Ans.)
(c) when both *, and k2 are closed,
no current through ánd
R2
= 120V
(b) If the voltmeter is removed, the
total resistance of the circuit will be
310+600+10= 9200
200 920
= 0.22A (Ans.)
5. (a) Power input = "IV
= БОСЫ
(3)(200)
(b) The power = mgy
= (20)(10)(2). = 400W
umber moles of e of
(b)
(g)
дубол
Jon
Ма
is
R1-zan
AnYin
5. An electric moter is used to raise a 20 kg mass vertically at a speed
of 2 ms! The motor takes a
current of 34 from a 200V mains.
ms-2):
(Take g = 10 ms
(a) What is the power input to the motor.
(b) Find the power needed to lift the mass at this rate.
B
effects..
modified Mercalli Scale.
(D) Effect
1989 中學會考預習專欄
a). Ground shaking
weaken
the Foundations building and break pipes. b) Rockslides, landslides
avalances.
of
and
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Geography (19)
Earthquake
of
(A) World distribution
ving
c) Tsunamis (20 m high)
d) Fine
P. F. Chan
-occur in plate margins, which one
zones of instability in the Earth's Crust
well-defined earthquake belts. e.g. Circum-Pacific belt,
Mediterranean-North
Belt:
(B) Causes
India
a} sudden and rapid vibrations within. Jarge rock masses of the earth's crust.
b) interaction of plates.
(C) Measurement
intensity
serious fine of the water mains.
have been destroyed.
e) Dam failure
Soil liquefaction
g) Ground settlement
may be twisted and tilted.
h) Interruption Communications.
1 Spread of diseases in aftershock
days.
(E) Humari Responses and adjustment.
General factors:
(i) experience
(ii) perception
(fii) magnitude,
frequency. W
(iv) education
SW WS
(Ans.)
earthquake drill.
(v) relief work
set up back-up and after-shock relief services.
international organization e.g. International Red Cross
Association.
Energy Resources (A) Introduction
energy resources are natural things: which provide power.
from
- fossil fuels are derived
organic matter which lived millions of years ago...
(8) Types of energy resource
(1). Renewable energy resources.
a) Nature
inexhaustible, recurrent, can be. reused.
no-polluting.
intensity and
b) types.
(iv) technological resources. (v) financial resources.
of
magnitude
and
Measunes adopted:
(5)
a) Magnitude
measure in terms of the total amount of energy released in its seismic waves at the source. recorded on the Richter scale (No.1 to over No. 8) b) Intensity.
measure of the degree of shaking in terms of the damage and other
predicting earthquake giving warning.
(1) solar energy
Sun's radiant energy.
safe.
and
(ii) water power
(ii) building design square or rectangular-shaped houses. and doors:
with small windows.
flexible frame.
(iii) landuse zoning, fine-resistant high-rise
are surrounded by canals planned areas.
dings and
obtained from moving or falling
water.
(iii) wave energy
(iv) tidal energy
(v) wind energy
(vi) geothermal energy.
12 = 2A (Ans.)
(d) When both, k, and k2 are open
total resistance = Rz#R1 = 120
= 1A [Ans.)
- igneous activities which emit
heat,
(II) Non-renewable energy resource
a) Nature
- transformed from solar energy
er derived from radioactive matter from the earth's crust. transformation takes a long
time. -exhaustible and finite in
quantity.
used up
more quickly by man than they can be replaced by
natural processes.
b) types:
(i) Coal
(ii) Petroleum
(iii) Natural gas
(iv) Biogas
{v}
Nuclear power
(C) World pattern of energy consumption (i) Relative importance
a) Wood
earliest fnanimate energy üset by man.:
widespread deforestation. consumption.
declined.
has
remains important in developing countries.
b) H.E.P.
greatly
some
advantages:inexhaustible:
high energy conversion efficiency.
(c) efficiency
Useful power output Input power
400
600
X-100%
= 66,67%
(d) Converted into heat.
x 100%
convenient transportation.
important only in regions where conditions suits its development:
- great head of water.
rivers with large volume of water.
regular and reliable water supply.
presence of lakes:
presence of gorges
large demand.
c) Coal
was utilized through the invention of the steam engine. has been important until the late 1960's when petroleum grew in importance.
disadvantages:
-
dirty, smog.
bulky, difficult and costly to transport.
-low calorific value.
causes environmental
degradation.
d) Petroleum
-rapidly gained importance since
1950's.
- advantages: clean
e) Natural gas
easy to transport
high calorific value
in use since 1950's
f) Nuclear power
was developed in the 1960's.
become
Important since energy crisis in 1973.
the
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