CITY HALL
育教僑華
日六十月二年申戊歷
WAH KIU YAT PO
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(接第六張第二頁)
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(5)(Q) 証恆等式.
CALS Y
- sec§
caco +
器
が
#
3#%3
*645%
(38)
***
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大興額習專襪
信
x+
數學科
(+)
·喬仲強、
cotto
****
CALB { CALO −1)+04¢® ( 04C8+!!
(C&CO+1) (0400-1)
1~ 2020
கசரிசி
seco - tamê ✯ ✯u ́ 4 «cˆo — ×+ ! + 2
:;
sec § + Tam ✪
1/1/2/
+ 2
Eco-Tamb seco+ tamerC
seco + ten ✡
→
skCô – tanė
1768
zcacio
英文中學會考試題預習專欄
生物科
(+)
- 2sec A
(✯4 £4)
廖百琴。
→
Į seco! + Lariė] 2sac*8 + 2 seco
cas*= ( 1 + cos 20)
第十九次預習題解答
(リー寿門高80人臓50、間此門設轉1550時其対角
线旋轉着干度?
(解)設如右图:
ABCD及ABQP導該門放轉
前後的位置,則<CBQ=155
A B C - BQ-50%
1844 BELCQ,
CE = CB sin, 155
= 5 sio 77.5"
LA ABC +.
Ac={5*+82 = 1
D
5'
# AE 8 AC=AQ, CE = CQ,
¿ CAE=¿ QAE. & AEL CO
P
(seco - ton0)2+ (secô + tan☺)* (seco + tanė) ( seco - İzin 8)
2 sečė + 2 tasĉo
Bet3) – tant B
- 2 sec§ + 2 tano + 2
2 sec' + 21 tamˆQ + 1 } ¿ sed's
(b)(a) $45 €* c*0+ cos *( @ +60°) + CM*( 8+ 120°) simið + sin( 0 + 65°) + sin (0+170)
() @ cos 20 — 2 cor*0
E
Q
NO.
LOG.
87
1.9494
代入
187
CE
0.9747
sim ¿CAE
AC
5
10.6990
5.0 77.5
Ain 77.5 7.98964
189
0.6886
31°10′
19 @
199
$
0.97476
17.7139
#
• ACE
7
30
cos 2.0!
2 am 01
同理
cad*( 6+ 60°) ————
sim" (B+ 60°) —
sin:0=$(1 - CAI 20)
£ [1+ cos (20+ 120°)}],
008 (28+120))
cos" (0+120°) = 21+ CO (287200°)]
sin”! 0+120°) -----
cos ( 29+ 240°)}
f
£{ 1+ cos 20) + Ź [ 1 + 20 (20 + 120°)] + £ [1 +ew (201248)}} 2(1-c0s 20)+ 2 (1-cos (20+120°)] +‡[1−008 (20+268)]
3+ cos 28 + codze + 120°)+ cos (20+246)
3 [cos 20+ cat ( 20 + 120°)+ 204(28+260")]
cos { 28+ 240°) + cos 20 === 2 cos 201340+ 20
— 2 cm ( 28 + 120°) cos 120° x 2 coś ( 20+ /20°)(- 4)
- costas + 120°)
Got
代入上式
3+0 3-0
1) Sexual reproductionTM is characterised by
the development of a new individual from a fertilized egg, or sygote, produced in turn by the fusion of two gametes, an egg and a sperm. The fertilised #gg then】 develops into a minute embryo by rapid cell divisions. This young embryo is slowly carried down the oviduct into the] uterus where it staya and undanross its embryonic development.
(11)@nd (111).
At first the developing ̋embryo obtains nourishments by breaking down the mucosa of the uterus with ensymas. After the embryo has been attached to the uterine decidus by a placents. The placenta 18 therefore the respiratory, nutritive, and excretory organ for the embryo. The two umbilical blood vessels (artery and vein) leave the embryo at the] navel, and pass through the umbilical cord to break up into capillaries in the chorionic villi and thus lie in a pool ofi maternal blood. The umbilical artery carries blood from embryo to the capillaries in the villi, and the vmbilical vein carries the blood from the capillaries to the embryo. It must ba) emphasized that the blood of the mother and that of the embryo are not in direct communication, but are separated by a thin membrane through which oxygen, nutrients and other materials diffuse from the blood of the mother to that of the embryo, nitrogenous wastes and carbon dioxide diffuse from the blood of the embryo.to.that of the maternal tissue.
placenta
< CAE
th¿CAQ== 62° 20°
答:对角线旋轉60°20
(2)某人於山麓測山頂之仰角茑45,由山麓上山之坡路 倾斜15登坡路160尺再測山頂之仰每尊60°求山烹
(解)話如右图:A為山麓,AD笃坡路,為
AM, N <BAC=45* «DAC 15°
AE=160 R BEF=60*
¿DEF < DAC = 15°
: BE D≈ 60°- 15*= 45^
✯ ABE☀,
¿ AE BTM 180*- 45°—135°
« BAE=45′′ 15*—— 30,
< ABE #180°- ( 135°+ 30*) —— 15°)
Ain 135°
AE
sin15
-AB-
AE min 135
180 mas
LAB
azer 15°
}
160 sim 45 son 45′′
#BC AB Aim 45°.
80
1600隻一隻
do cac 16′′ — dox 3.86 37 — 309. 1
答:山高 309.1
(3) ̄a-ABC & - a=73, b=52,-c=91. ✯
(*) ***
(b) att
(C) 外接园半徑
[48] $=&{a+b+c)=£(73+52+91)- == 108
5-2-35 $&$6, 5- = 17.
HONG
He conÏ $(1+ Can-20) I ain't he &
我时常用之方法
(b)謖A,B,C葛三角形試
)— cos 28).
( sin A - sin B + sin C) tan §==*(sinĂ+ sin B – sin() tom G}
(-) a
A + B + C == 180°
A+8
2 = 90°
A-8
lin A-sine + sin C ====2 cos sin + sin cos — 2 cos( 90′′. §) sin Al + 2 sin & cos (70°- A+C)
- 2 sin & sin Aza 4 z sin & sin, At
2sin € (sin Ates in the
• 블
Ian & sin & ans.
( sın♬ ¬simB + sin C) tantos
= is sin å sin ein G
Jo] EdÈE (ein A+ sin 8 – sin 2) tam &:
~A+8} ·
chorionic villi
uferine decidua
- oviducti
_uterme Cavity
-chorion
Embryo
"The developing embryo in uterus
RIES
umbilical.
cord
Amniotic fluid Amnion]
NO.
200
hmm (5-2) (5-1) (S-C)
((6-2) (5-C) _ [35 x 36 x 17
35
1.5441
56
142
17482
17
+
1.3304&
- log s 1.
1.2447
4.5.247
208
2.0334
·A· 14 4 = 26*89′
2
A= $3°18
tan ★#8 £=ras!
R
**. B- 34* 50′′
-
**** 180°~{ A+B)—— 91° 52′′′
[s(5-a) (5-4) (5-0)
•| 108 × 35 × 56 × A
1897
4A
45.51
73× 53 × 91 *** 1897.
73×13×9/ 1997
A: (@)=3°18′ = 8mx 34*50′′* C=91*52.
(8)面積點:1897平方單位
(C)外园半径一45:51.
35.493
1.3447
1.2447 5-a635) 1.54U/E
77006 1.2447
--
|8-8 (56) 1-74826
7.4965
2.0334
108 95
1.54 |
56
1.7492
17 1.23044 26.5561
1897 3.4781 73 1.7633
139
1.9590€ 4-9312
1897 3.37816 45.51| 1.6581"
(4)-黑板斜放與地面成710元角,潘在此黑板上一條 奥底込成まで直城間光直体地面成度? (解)設如右图: ABCD為黑板, ABEF涕地面,則<CBET'
A¢$##÷1#, @ 4 ©AB=33′′
✯st a ABC♣.
*** 96.
Xt sto BECT. B¿ C68-
/ CE — BC sim 7)°
#st. A ACE+,
CE=
BC d
BC C4033°
= sin71′′ sin33°:
log sin Dom log sim 31°*° lug sim 33′′
=7-9357+T2561
*** T. 71182 (mollig sin 31o)
= 31*
答:此直线夹北面成35之角
Am A
x tan
sime
RA!
Aûm C
aim C --
simB=RR
代入
( sin A - sin B+ sin C) tan £= (-24 ·☆) ·☆✩
FR
R (25- ab)
sta-bnc)
IBX
R{a+b+c=x£},
(sin A+ sin B – sin C) tan £= £
PUBLIC
第二十次預習題
(1)設 ABCD為國之内接四边形。其对角线交於試在
AE() AB-AD+CB-CD
(i)
AB-AD CB-CD CE
BA-BC÷DA DC
AC
E
(2)設AD篤。因切线,ABC笃割线
AE為過AR任意直线溢 AE AD, EB, EC 落块 0园交於F及G試FGIIAE
ర
R
(3)A爲0圈外任意貞遇A10园直径BC 及任意劃线 'APQ, XL Q17 OR1BC BOEHR #PR✯ AC# D.
AB: AC= DB; DC (A#+**)
(4) PA, PC Ž OR ÷ + 1, & A14 11 AB, C 1 AB★ ★ #ˆ'* ABXD CD Ž 7B 4 PD.
(5) # 17 −2) 4L # = L * #2***
(6) L*« =*=} ti hama A. Ba
@#$*R*% abs hæt
181
·During pregnancy the large amount of estrona secreted by the placenta prevents the formation of prolactin. But immediately after the expulsion of the placenta during birth the estrone content of the blood falle. to a very low-level and thereby allows the secretion of prolactin. After delivery the mammary glands begin to secrete milk.
When birth begins, the uterine wali contracts at regular intervals. These contractions gradually increase in strength and frequency, in the man time, the cervix gradually dilates. Finally, the contractions of uterine wall and abdɔminal muscles will fores the foetus passing out through the vagina. After birth, the uterus reduces in size and later obtains the same sa before
pregnancy.
(b) In mammals, they give birth to the well- developed young offspring. During the embryonic development, embryos that are to i develop into homoiothermic adulta must apparently have a warm, constant temperature i to develop normally, so mammals cannot produce eggs and then ignore them. The fertilised eggs are therefore retained within. a special region, the uterus, to develop.
Care of the young does not stop at birth,| for all female mammals have speciliz ed mammary glands which secrete a nutrient SLAM! on which the young offspring feed.
In birds, they must lay their eggs in a nest, or on a suitable place which provided before the deposition of their #ggė. During incubation, the mother bird must sit on the egg to supply it suitable temperature for hatching. After birth, the young birdə arı reared by the parents until they can live independently.
In frogs, from the developasnu or the embryo to the formtion of adult frog is without any parental care; for the hatching of egg is affected by the temperature of the environment and the developing embryo depando. upon the yolk for food supply.
Gumatjons for this week:
*1. vescribe with the aid or a diagram the extermM)
features of a frog. What mentioned features of • frog do you consider as the adaptation of the frog to its environment.?
2. Outline the changes that occur during the
dayslagsett of a newly hatched tadpole isto i frog. Indicate how (1) feuding, (ii) breathina: is acomplished, at each staza..