第20题: [单项选择]When is the birthday party having A. About 7:30. B. About 8:00. C. About 8:30. 参考答案:B 答案解析:[听力原文] W: Some friends are having a party for me tonight. Do you want to come M: Very much. W
第21题: [单项选择]下列关于混凝土“徐变”说法不正确的是()。 A. 结构尺寸越小,徐变越大 B. 加荷时混凝土龄期越短,徐变越大 C. 混凝土强度越高,徐变越小 D. 持续加荷时间越长,徐变越小 参考答案:D