C60以下的混凝土在现场水泥的配料精度应控制在( )。
A.±5%
B.±3%
C.±2%
D.±1%
参考答案:C
Do you go to work ?[ ]
A. on foot
B. by your bike
C. take a bus
D. by cars
单侧扁桃体短期内进行性增大首先应考虑:()
A.扁桃体息肉
B.扁桃体周围脓肿
C.急性扁桃体炎
D.扁桃体肿瘤
E.以上均不是