高炉冶炼要求入炉烧结矿中＜5mm的粉末量应少于（）。
A.20%
B.10%
C.5%
参考答案：B
货币的基本职能是衡量商品的使用价值的大小和充当流通的中介。[ ]
用适当的词填空。
1. I don't know _____ I can do for you.
2. — Could you tell me _____ the film begins, please?
— About six o,clock.
3. He doesn't know _____ his father is so worried about him ?
4. — Do you know _____ he gets off the bus?
— At the next stop.
5. Could you tell me _____ is the man standing over there?
6. Can you tell me _____ that's a fast train or not?
