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问题 单项选择题

Ⅱ型观测线最适用于下列哪种卡环（）

A.三臂卡环

B.Ⅱ型卡环

C.Ⅲ型卡环

D.三臂卡环和Ⅱ型卡环

E.Ⅱ型卡环和Ⅲ型卡环

答案

参考答案：B

解析：Ⅱ型观测线（第二类观测线）：适用Ⅱ型卡环，即铸造分臂卡环。

阅读理解

读短文，选择正确答案。

      My village is very beautiful. There are many mountains near my village. There is a forest in the mountains.

There are many big trees in the forest. Two bridges are over the river. The river is near my house. Look! There

are many ducks and boats on the river. There are many fish in the river. I love my village very much.

1. Where are the ducks?

A. They are on the grass.

B. They are on the river.

C. They are in the river.

2. Are there any mountains near my village?

A. Yes, there is.

B. Yes, there are.

C. No, there aren't.

3. Is there a river?

A. Yes, there are.

B. No, there isn't.

C. Yes, there is.

4. Is it a beautiful village?

A. Yes, this is.

B. Yes, there is.

C. Yes, it is.

5. Do you like the village?

A. Yes, I can.

B. Yes, I am.

C. Yes, I do.
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单项选择题

矿用柴油机机油油温最高不许超过（）

A、85℃

B、93℃

C、110℃

D、130℃
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