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【判断题】
电磁感应定律描述了两个载流导体间相互作用力的规律。因此，在电磁感应定律的基础上建立了磁感应强度的概念。 磁场强度描述的是在磁场某一点处源磁场本身的强度和磁介质在磁场中被磁化产生的磁场强度的叠加。A.
正确
B.
错误
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【单选题】The class ( )( )( ) over, we had a ( )( )( )discussion.
A.
been ... heat
B.
being ... heated
C.
is ... heating
D.
be ... heated
【简答题】I phoned my first teacher timeand again when I heard that he was ill, yet couldn’t . A. getthrough B. get along C. getover D. get hold of
【单选题】The children talked so loudly at dinner table that I had to struggle ____.
A.
to be heard
B.
to have heard
C.
hearing
D.
being heard
【简答题】I was sleeping soundly last night when I was awakened by someone’s groans（呻吟）.I listened , and heard it was from Sam，a student from Africa. I really wanted to go on sleeping, as I had insomnia（失眠）and ...
【单选题】Henry Durant put forward the idea because he
A.
had once fought in a war in Italy.
B.
had been wounded in a war.
C.
had assisted in treating the wounded.
D.
had seen the casualties and cruelties of war.
【单选题】The children talked so loudly at dinner table I had to struggle _________.
A.
to be heard
B.
to have heard
C.
hearing
D.
being heard
【单选题】听力原文：M：You didn't go to the lecture last night either, did you? W：No，I had a severe headache． Q：What do we learn from this conversation? (13)
A.
The man went to the lecture, but the woman didn't.
B.
The woman went to the lecture, but the man didn't.
C.
Neither of speakers went to the lecture.
D.
Both speakers went to the lecture.
【单选题】忽略过滤介质阻力,板框过滤机恒压过滤,滤饼不可压缩。当压差增大一倍,则同样过滤时间里所得滤液量将( )。
A.
增大至原来的 1.414 倍；
B.
增大至原来的 2 倍；
C.
增大至原来的 4 倍；
D.
不变
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