水泥的细度对水泥（）有较大的影响。
A.安定性
B.需水量
C.凝结时间
D.强度
参考答案：A, B, C, D
溴被称为“海洋元素”。溴的元素符号是
A．B
B．Be
C．Br
D．Bi
—_____ that day?
—It was Monday. [ ]
A. What day is it
B. What day was it
C. What time is it
D. What was the date
