C30混凝土用砂含泥量不宜超过（）。
A.1.O％
B.3.0％
C.5.O％
D.4.0％
参考答案：B
用括号里所给词的适当形式填空。
1. My parents want me (study) hard at school.
2. His idea is (originally).
3. Let’s invite Tom ____________ (play) volleyball.
4. I lost his book., and I don’t know what ____________(do) with it.
5. I'm ____________(tired) today than yesterday.
鼻咽癌较易转移到( )
A．左锁骨上窝淋巴结B．右锁骨上窝淋巴结C．颈部淋巴结D．腋下淋巴结E．以上都不是
