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问题 单项选择题 A1型题

对于逆行性牙髓炎的患者，探诊检查最可能发现的是（）

A.牙龈出血

B.龈下牙石

C.釉突

D.深牙周袋

E.溢脓

答案

参考答案：D

解析：逆行性牙髓炎是经由深牙周袋感染牙髓的，故名逆行。

句型转换

句型转换。

1. Another man-made satellite was sent up into space by them last week. (变主动语态) 

                                           another man-made satellite into space last week.

2. People there planted many trees last year. (变被动语态) 

   Trees                           by people there last year.

3. They grow vegetables on the farm. (变被动语态) 

    The vegetables                           on the farm.

4. Must the old people                            (speak) to politely?

5. English                           (speak) in many countries, but the Chinese              (speak) their own language.

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单项选择题

在计算列车的基本阻力时，当货车装载货物达到标记载重（）的车辆按重车计算。

A、30%

B、40%

C、50%

D、60%
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