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【单选题】
某明挖地铁车站，标准段采用地下二层跨结构，现采用二维荷载－结构法进行计算，几何模型如下图所示。关于边界施加，以下说法正确的是（）。 【图片】A.
地表为自由边界，其余各面均约束其法向位移
B.
各面均约束其法向位移
C.
底面采用弹簧支座，其余方向均为自由边界
D.
底面采用弹簧支座，底面中部约束 X 向刚体位移，其余方向均为自由边界
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举一反三
【单选题】The bank manager asked his assistant if it was possible for him to________the investment plan within a week.
A.
work out
B.
put out
C.
make out
D.
set out
【简答题】A.Listen to the dialogue. Take notes. Then complete the summary. Mr. Jackson works in the ___ 1 ___ with a good salary. As his old car is too old to be worth ____ 2 ____, he would like to have a newer...
【简答题】Listen to the dialogue, then complete the summary. Mr. Jackson works in the___1___ with a good ____2__. As his old car is too old to be worth ____3___, he would like to have a ____4_____ one. Since he...
【单选题】The bank manager asked his assistant if it was possible for him to ________ the investment plan within a week.
A.
work on
B.
work for
C.
work towards
D.
work out
【简答题】Listen to the dialogue. Take notes. Then complete the summary. Summary Mr. Jackson works in the ____ _1__ ___ with a good salary. As his old car is too old to be worth _____2____, he would like to...
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