提高水泥的细度，可以产生（）的影响。
A.水化速度快
B.早期强度高
C.体积收缩大
D.成本提高
参考答案：A, B, C, D
There are two _____ in the streets. In the first shop, there are two _____.
A．chip shop; woman seller
B．chip shops; women sellers
C．chip shops; woman sellers
D．chips shops, women sellers
痄腮发病率较高的年龄阶段是（）
A.6个月～1岁
B.1～3岁
C.3～5岁
D.学龄期
E.青春期
