问题 解答题

如图是女性排卵、受精和开始怀孕的示意图,据图回答下列问题:

(1)[1]的生理主要功能是______;

(2)有人把试管婴儿理解成在试管中生儿育女,这是不准确的.试管婴儿使用人工的方法在试管中完成______和胚胎的早期发育.而胚胎和胎儿的发育仍在母体的[______]______中进行.

(3)一般来说,从怀孕开始胎儿要经过______周的发育才能成熟.胎儿成熟后从[______]______排出母体体外,该过程在生物学上称为______.

答案

由女性生殖系统及排卵、受精和怀孕示意图可知:①卵巢,②输卵管,③子宫,④ * * .

(1)卵巢是女性生殖系统的主要生殖器官,能产生卵细胞和分泌雌性激素;

(2)子宫是胎儿发育的场所,试管婴儿也有受精和在3子宫内发育的过程,试管婴儿是从患有不孕症妇女的卵巢内取出成熟的卵子,将精子、卵子一起放入试管,体外培养三天左右,使卵子受精,然后再在B超监视下将其送到母亲子宫,使之逐步发育成胎儿的过程.也就是说试管婴儿经过取卵--受精--植入三部曲,最后还是要在母亲子宫内发育成熟直至分娩.

(3)生殖细胞包括睾丸产生的精子和卵巢产生的卵细胞,含精子的精液进入 * * 后,精子缓慢地通过子宫,在输卵管内与卵细胞相遇,有一个精子进入卵细胞,与卵细胞相融合,形成受精卵;受精卵不断进行分裂,逐渐发育成胚泡;胚泡缓慢地移动到子宫中,最终植入子宫内膜,这是怀孕.当胚胎成功着床后,胚胎继续发育,胚胎发育到第8周末,其外貌开始像人,从此称作胎儿.母体怀孕40周(280天)左右,胎儿发育成熟.成熟的胎儿从母体的4 * * 产出的过程成为分娩.

故答案为:(1)产生卵细胞和分泌雌性激素

(2)受精作用;[3];子宫(3)40[4]; * * ;分娩

完形填空

根据短文内容,从下面A~G选项中选出能填入空白处的最佳选项,并在答题卡上将该选项涂黑。选项中有二项为多余项。

Culture Shock

Culture shock refers to the anxiety and feelings (of surprise, uncertainty, confusion, etc.) felt when people have to operate within a different and unknown cultural or social environment, such as a foreign country.

Generally speaking, we could say that there are four stages of culture shock. The first stage is called “the honeymoon”.In this stage, you are excited about living in a different place.  小题1: 

The next stage is “the hostility(敌意)stage”. In this stage, you begin to notice not everything is as good as you originally thought it was.   小题2:  Moreover, people don’t treat you like a guest anymore.

Then you come to the third stage called “recovery”. In this stage, you start to feel more positive.   小题3:  The whole situation starts to become more favorable and you begin to learn to adapt yourself to it.

The last stage of culture shock is called “adjustment”. In this stage, you have reached a point where you actually feel good.  小题4:  The things that originally made you feel uncomfortable or strange are now things that you understand. Now you have adjusted to the new culture and you feel comfortable.

Not all individuals visiting another country will experience all these four stages.   小题5:  It also occurs within cultures as individuals move from place to place or from one setting to another (e.g., from high school to college).

A.You feel that friends should help each other to deal with culture shock.

B.And you try to develop comprehension of everything you don’t understand.

C.In addition, culture shock is not limited to the overseas visitor.

D.You become tired of many things about the new culture.E. You have learned enough to understand the new culture.

F. You begin to understand you need to travel a lot.

G. And everything seems to be marvelous and everybody seems to be so nice to you.

问答题