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A．/B．inC．ofD．on

A. /
B. in
C. of
D. on

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某砖石承重结构条形基础上荷载标准值Fk=160kN/m，基础布置和地基土层断面如图所示，基础的埋置深度为1.60m，采用振冲砂石桩置换法处理淤泥质粉质黏土。砂石桩长7.0m(设计地面下8.2m)，直径d＝800mm，间距s=2.0m，等边三角形排列。则复合地基承载力特征值为()kN/m2。

A. 122.69
B. 211.78
C. 156.9
D. 189.67

99% junk mail is thrown into the garbage bin without being opened.

A. Right
B. Wrong
C. Not mentioned

All the following can benefit from computers according to the passage EXCEPT______.

A. businessmen
B. customers
C. teachers
D. publishers

The only drawback of junk mail is that it wastes our time.

A. Right
B. Wrong
C. Not mentioned