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问题 单项选择题

71岁女性，突发鲜血便5小时，急诊行99Tcm-RBC消化道出血显像如图，随后行选择性肠系膜动脉血管造影术如图，诊断是()

A．横结肠出血

B．空肠出血

C．回肠出血

D．乙状结肠出血

E．以上都不是

答案

参考答案：D

西周时期实行的制度有( )

①禅让制      ②世袭制   ③分封制    ④等级制

A．①②③

B．①②④

C．②③④

D．①③④
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句型转换

根据要求变换句式。

1. Mr. Smith gave up (放弃) smoking two years ago. (改为同义句)

    Mr. Smith ________ ________ two years ago.

2. You must be quick. If not, you'll miss the early bus. (改为同义句) 

    ________ quick, ________ you'll miss the early bus.

3. I don't know what I should do with the letter. (改为简单句)

    I don't know what ________ ________ with the letter.

4. My father asked, "Shall we go to work by bike everyday?" (改为宾语从句)

    My father asked ________ we ________ go to work by bike everyday.

5. "Don't play football on the street, little boys," the policeman said. (变成间接引语)

    The policeman told the little boys ________ ________ ________ football on the street.

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