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问题 选择题

草履虫在显微镜下有时会呈现绿色，这是因为（　　）

A．含有叶绿体

B．食物中有绿色藻类

C．含有叶绿素

D．折光的结果

答案

草履虫属于动物界中最原始，最低等的原生动物，其营养方式是异养，体内不含有叶绿体；草履虫喜欢生活在有机物含量较多的稻田、水沟或水不大流动的池塘中，以细菌和单细胞藻类为食．因此在显微镜下有时呈现绿色是食用了绿色藻类的结果．

故选：B

听力题

You can find all kinds of information in just                  

a few minutes on the Internet. It’s l__1____ going to a    1. __________

huge ____2____(图书馆) without having to walk around to     2. __________

find your books. Recently,  ___3____, many people           3. __________

have been d____4____ the dangers of the Internet.           4. __________

There have b___5____ reports in America about people        5. __________

trying to steal personal information for bad ___6____(目的).     6.___________         

Finding information ___7____the Net is easy. But not all    7. __________

information is good to ___8___(社会). For example, you      8. __________

can find such information as ___9___ to kill people.        9. __________

The problem will become more s___10___ in the future.       10.___________       
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单项选择题

国债买断式回购初始结算交收E(T+1日)日终，结算参与人T+1日有交收透支且特T日已待交收证券申报为待处分证券的，中国结算上海分公司应( )从该参与人相关的待交收证券及其产生的权益中确定待处分证券。

A．按成交顺序由前往后

B．按成交顺序由后往前

C．按成交编号由前往后

D．按成交编号由后往前
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