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【单选题】
青春期感染腮腺炎病毒易合并A.
脑膜炎
B.
肺炎
C.
肝炎
D.
肾炎
E.
睾丸炎或卵巢炎
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【单选题】、There are many _____ in our school.
A.
woman teachers
B.
man teachers
C.
women teachers
D.
men 's teachers
【单选题】There are over 300 teachers in our school,_________ of them are women teachers.A．two fifthsB．seco
A.
7. There are over 300 teachers in our school,_________ of them are women teachers. A．two fifths
B.
second five
C.
two five
D.
two fifth
【单选题】We forgot to bring our tickets, but please let
A.
7. We forgot to bring our tickets, but please let usenter, _______. ( 全国 3) A. do you
B.
can we
C.
willyou
D.
shallwe
【简答题】直流电源电路中,如果电压器副线圈的电压为U2,则经过半波整流后的电压Uo= U2; 若是桥式整流电路,整流后的电压Uo= U2;经过电容滤波,且RC=(3~5)T/2之后, 输出电压Uo= U2。
【简答题】7. Our teacher is
strict. Our teacher is fair.
【简答题】已知定义域为R的函数 是奇函数． （1）求a的值； （2）判断函数f（x）在R上的单调性，并证明你的结论． （3）是否存在实数k，对于任意t∈1，2]，不等式f（t 2 ﹣2t）+f（2t 2 ﹣k）＞0恒成立，若存在，求出实数k的取值范围，若不存在，说明理由。
【单选题】Our older generation used to advise us not to build ____ in the air, but that’s not realistic at
A.
7. Our older generation used to advise us not to build ____ in the air, but that’s not realistic at all. A．attics
B.
castles
C.
building
D.
Rostrums
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