大体积砼浇筑时，宜采用（）。
A、硅酸盐水泥
B、普通硅酸盐水泥
C、矿渣硅酸盐水泥
D、火山
参考答案：C
根据句意及首字母提示完成句子。
1. I often make f______ to learn the new words.
2. Please read a _______ to practice speaking English.
3. Mr. Wang's __________ (pronounce) is very standard. So we usually ask
him for help.
4. My brother__________ (learn) English for five years. He can speak
English very well.
5. What about __________(listen) to music?
脑干的放射耐受量为（）
A.500～1000cGy
B.1000～2000cGy
C.2000～3000cGy
D.3000～4000cGy
E.5000～6000cGy
