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【单选题】
当发生传染病时,对疫源地进行的消毒称为( )。A.
预防消毒
B.
临时消毒
C.
终末消毒
D.
日常消毒
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【简答题】从二极管的伏安特性曲线可知,二极管加()电压 ,并大于门槛电压时,二极管导通。导通时的正向压降硅管约为()伏,锗管约为()伏。
【简答题】Dear Mom and Dad, I'm afraid I have some very bad news for you. I have been very naughty and the school is very angry with me. She is going to write to you. You must come and take me away from ...
【单选题】I don’t think Mary and Sue _____ before, ______?
A.
have met; haven’t they
B.
have met; have they
C.
have seen; do I
D.
have seen; don’t they
【简答题】I have been very lucky to have won the Nobel Prize twice. It is, of course, very exciting to have such an important recognition of my work, but the real pleasure was in the work itself. Scientific res...
【简答题】中国教育技术学的形成经历了 3个阶段: 20世纪20年代-60年代前期,电化教育的__ __阶段; 20世纪60年代后期-70年代前期。电化教育的___ ____阶段; 20世纪70年代后期以后,电化教育的____ ____阶段。1984年,我国开办电化教育专业,标志着电化教育学这一学科在我国的建立。___ ___年,原国家教委把电化教育学更名为教育技术学。
【单选题】I needn’t remind you of that terrible tie. You don’t want me to ________ that terrible tie.
A.
recall you
B.
remember you
C.
memories you
D.
make you remember
【简答题】Dear Mom and Dad , I'm afraid I have some very bad news for you . I have been very naughty（淘气的） and the school is very angry with me . She is going to write to you . You must come and take me a...
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