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【简答题】
如图所示 一个半径为R的半圆形线圈通有电流I。线圈处在与线圈平面平行向右的均匀磁场日中。线圈所受磁力矩的大小为______，______。把线圈绕OO轴转过角度______时，磁力矩恰为零。
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【单选题】一土样的天然含水率 ω=30% ,液限 ω L =35% ,塑限 ω P =20% ,试分别确定该土样的塑性指数 I P 与液性指数 I L 的数值为 。
A.
16、0.57
B.
15、0.67
C.
14、0.47
D.
18、0.79
【单选题】The reason ___ he is absent is ___he has a bad cold.
A.
why; that
B.
why; because
C.
that; because
D.
for; that
【单选题】He has a bad cold. He'd better_____________.
A.
drinking some hot water
B.
to drink some hot water
C.
drink some hot water
D.
drinks some hot water
【简答题】一土样的天然含水率 ω =30% ,液限 ω L =35% ,塑限 ω P =20% ,试确定该土样的名称称并判断其处于何种状态。
【单选题】Is Tom at school today? No, He's at home ______ he has a bad cold. [ ]
A.
because
B.
if
C.
until
D.
before
【简答题】听下面一段对话，回答第1小题。 1. What's the matter with the boy? A. He has a bad cold. B. He has a headache. C. He has a toothache.
【单选题】He has a bad cold. He shouldn't eat___________for 24 hours. [ ]
A.
something
B.
nothing
C.
anything
D.
none
【单选题】He has to stay at home. ( ) he has a bad cold.
A.
This is because
B.
That's why
C.
So is it
D.
The reason is
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