简述人胎盘的组织结构及其功能。

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问题:

简述人胎盘的组织结构及其功能。

考点:发育生物学发育生物学题库
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Want to be smarter with your money? Here’s how.

  小题1:  Many kids quickly spend every dollar they receive, while others save their money, rarely buying anything. But what you want is a balance between saving and spending. Consider the 25--50--25 rule. Out of every dollar you receive, allow yourself to spend 25cents to buy gifts for family or give to charities.

 小题2:  The T--shirt looks so cool in the store. But when you get it home, you wonder why you wasted your money. Sound familiar? This often happens with impulse purchases(冲定性购买). Advice: Rather than buying the T--shirt right away, spend a few days thinking about whether it’s really the best use for your money.

Challenge yourself. It’s hard to save money just for the sake of saving money.   小题3:__ Suppose you want a skateboard. Find out how much it costs and then decide how much you will save each week.   小题4: That will make you even more determined to stick with it.

Prove your worth. Want your parents to give you more pocket money? Sure, it helps to do some housework and get good grades.   小题5:  If you show you are a good saver and a careful spender, your parents are more likely to trust you with more pocket money.

A.Wait a week.

B.Keep your balance.

C.Stop buying cloths.

D.What you need are goals.E. But the real key is to prove you know how to handle money.

F. You might even tell your parents and friends about your plan.

G. Form a good habit of saving money whenever it is possible.

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一患者以高位小肠梗阻急诊入院,手术切除空肠一段,见肠壁靠浆膜侧有直径4cm球形肿物一个,境界清楚,有包膜,质软,切面淡黄色,肉眼诊断是()

A.脂肪瘤

B.平滑肌瘤

C.神经鞘瘤

D.结核

E.平滑肌肉瘤

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“玉米黄,高粱红,大地笼罩青纱帐”这是哪个地区的农业生产景观(  )

A.青藏高原

B.东北平原

C.塔里木盆地

D.长江中下游平原

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用清水吸收氨气的过程中,其传质速率主要受()控制。

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疟疾中的正疟是指()

A.热多寒少

B.寒热休作有时

C.寒少热多

D.但热不寒

E.但寒不热

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