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问题 多项选择题

关于土层中的有效应力原理下述( )正确。

A．土体中的总应力与土体自重、土体中静水压力及外荷载有关

B．总应力等于有效应力与孔隙水压力的和

C．有效应力在数值上总是小于总压力

D．孔隙水压力可能大于零、可能小于零、也可能等于零

答案

参考答案：A,B,D

选择题

用所给单词的适当形式填空。

1. Susan swims very well. She is a good ______. (swim)

2. Lily always helps her mother clean the house. She is very ______. (help)

3. My brother often ______ (play) basketball on Wednesday afternoon.

4. Thank you very much for ______ (write) to me.

5. Every day Millie spends half an hour ______ (read) English.

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问答题 简答题

影响考评的因素有哪些？
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