热水锅炉，补给水泵的流量，应根据热水系统正常补水量和事故补水量确定，并宜为正常补水量的（）倍。
A.5～6
B.4～5
C.3～4
D.2～3
参考答案：B
我国金融债券的发行始于（）。
A．北洋政府时期
B．国民党政府时期
C．1993年，中国投资银行被批准发行
D．1994年，我国政策性银行成立后
根据句意填入单词。
1. This is the refrigerator. It is c inside.
2. My hands are dirty. I w my hands. Now my hands are c .
3. Mum is c eggs on the stove.
4. It's 12:00. It's time to eat l .
5. Come in. I'll s the rooms in my house.
6. Please p me the peas.
Here you are.
7. Today is September tenth. Tomorrow is September e .
8. Where is the toilet?
It's in the b .
9. Is this your watch?
Yes, it's m .
