一般取塑性区最大深度zmax=（）时的荷载作为地基的允许承载力，此时对应的荷载称

A.

the old man was the boss of the restaurant

B.

she was worried that the old man might cause trouble to the restaurant

C.

she saw the old man had some difficulty moving and taking a seat

D.

the old man had asked her to wait on him

Mary ran over to the old man because _____.

A.

the old man was the boss of the restaurant

B.

she was worried that the old man might cause trouble to the restaurant

C.

she saw the old man had some difficulty moving and taking a seat

D.

the old man had asked her to wait on him

参考解析：

（ 1/3~1/4 ） B

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