第17题: [单项选择]{{I}}Questions 22~25 are based on the following conversation:{{/I}}Why didn’t the woman go swimming A. She doesn’t know how to swim. B. The water was too deep. C. The water was too cold. D. She didn’t have enough time. 参考答案:C
第25题: [多项选择]在对水泥砼用砂筛分试验中,其主要有()。 A. 按筛孔大小顺序进行筛分 B. 每分钟的筛出量不超过试样总量1%时,停止该号筛筛分 C. 各号筛的分计筛余量和底盘剩余量的总量与筛前的试样总量相比,其相差不超过1%。 D. 两次筛分试验计算的细度模数之差大于0.2,重新试验。 参考答案:A, C, D