女，68岁，近3个月来常有黏液血便，大便次数增多，有肛门坠胀及

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问题单项选择题

女，68岁，近3个月来常有黏液血便，大便次数增多，有肛门坠胀及里急后重感，大便变细，上述症状进行性加重。查体：生命体征平稳，腹部无明显阳性体征。血、尿常规均正常。

首选的检查应是（）。

A.乙状结肠镜

B.腹部B起

C.腹部CT

D.钡灌肠

E.直肠指检

答案

参考答案：E

句型转换

按要求改写句子。

1. My mother takes the bus to work every day.（改为否定句）

My mother _____ _____ the bus to work every day.

2. Every day her father comes to his company by car. （改为同义句）

Every day her father _____ to his company.

3. His home is about 10 kilometers from the school.（对画线部分提问）

_____ _____ is his home _____ the school?

4. He walks to school.（同上）

_____ _____ he get to school?

5. I usually spend three hours doing my homework.（改为同义句）

It usually _____ me three hours _____ _____ my homework.

6. My father usually goes to work by bike.（同上）

My father usually _____ _____ _____ to work.

单项选择题

在流量测量方法中，（）的测量方法是以测量在管道内流体平均流速v为依据，在已知管道截面积A的条件下，就可以测出工作状态下的体积流量q₀=v_A。

A、容积测量原理

B、流速测量原理

C、动量原理

D、差压原理