问题
单项选择题
泥浆含砂量愈小愈好，一般含砂量不应大于（）。
A、6%
B、4%
C、5%
D、6%
答案
参考答案：B
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泥浆含砂量愈小愈好，一般含砂量不应大于（）。
A、6%
B、4%
C、5%
D、6%
参考答案：B
A. supermarket
B. park
C. library
3. When do we use umbrella and boots? It's _____.
A. rainy
B. sunny
C. windy
4. It's a thing. When you go on a trip and take some pictures, you will take it. It's a _____. [ ]
A. tent
B. umbrella
C. camera
5. What has hands but no feet, a face but no eyes, tells but does not talk? It's a _____ . [ ]
A. table
B. blackboard
C. clock