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【简答题】
如图，设磁场在半径R=0.5m的圆柱体内是均匀的，B的方向与圆柱体的轴线平行，B的时间变化率为1.0×10 -2 T/s，圆柱体之外无磁场。试计算圆柱横截面上离开中心O点距离为0.1m，0.25m，0.5m，1.0m处各点的涡旋电场场强。
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举一反三
【单选题】The scientists are expected to ______ some new suggestions on treating A(H1N1) flu spread all over the world after reading all the materials.
A.
keep up with
B.
put up with
C.
look up to
D.
come up with
【单选题】Profits this year were
A.
worse than expected.
B.
the same as expected.
C.
better than expected.
【单选题】I arrived late and missed the flight. I _____ the traffic to be so heavy. [ ]
A.
hadn't expected
B.
haven't expected
C.
wouldn't expect
D.
was expected
【单选题】列宁说:“要向大的目标走去,就得从小的目标开始。”这说明
A.
长远目标是分阶段实现的
B.
大目标能带动小目标实现
C.
必须优先考虑大目标
D.
长远目标都指向小目标
【单选题】I never expected there a chance to be sent abroad for further education. [ ]
A.
to be
B.
being
C.
to have
D.
having
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