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问题 单项选择题

下述机泵类型中本装置没有的是（）。

A、蒸气喷射泵

B、往复泵

C、液下泵

D、涡流泵

答案

参考答案：D

填空题

当制动轮直径≤200mm时，其径向跳动不应大于（），当制动轮直径>200mm时，其径向跳动不应大于（）。
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阅读理解
根据A、B、C三个表格所提供的信息，判断正误，正确的用A表示，错误的用B表示。
(A) I am Bob. I like school things and I have a great collection. I have three pens, five pencils, six rulers and two erasers.
They are in my pencil case, I have a nice pencil sharpener too. It's blue and it's in my backpack. I take my backpack to
school every day.
(B) I am Jimmy. I like sports and I have a sports collection. I have five soccer balls, two basketballs, five ping-pong balls,
six tennis rackets and four volleyballs. I like tennis and I play tennis with my friends every afternoon.
(C) I am Salina. I don't like school things and I don't like sports. I only like my toys(玩具).
( )1. Bob has three pencils.
( )2. Bob's pencil sharpener is blue.
(     )3. Salina doesn't like sports.
( )4. Jimmy doesn't have soccer balls.
( )5. Jimmy plays basketball with his friends every afternoon.
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