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【单选题】
三极管工作在截止状态的偏置条件是( )。
A.
发射结正偏,集电结反偏
B.
发射结、集电结均正偏
C.
发射结零偏或反偏,集电结反偏
D.
只要发射结正偏
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【单选题】(安徽省马鞍山市2009届高三第一次教学质量检测) It was reported that as many as 50%of patients do not take medicine directed , has drawn doctors’attention.
A.
when;it
B.
as;what
C.
as;which
D.
that;and
【单选题】The lifeboat releasing gear lever should be marked with the words ______.
A.
DANGER,DO NOT TOUCH
B.
DANGER,BOAT MAY DROP
C.
DANGER,LEVER RELEASES BOAT
D.
DANGER,LEVER DROPS BOAT
【单选题】Insurance premiums do not become too high because
A.
not many people suffer loss
B.
they are ftxed according to how likely the riskof loss is to happen
C.
not many people insure themselves
D.
insurance companies compete with each other
【简答题】In fact, scientists do not fully understand how the memory works but they have not shown that there is any limit to the amount of information that the human brain can store.
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【单选题】下列各项,属于美术教学中的现代教学媒体的是()
A.
实物模型
B.
教学软件
C.
欣赏挂图
D.
黑板板书
【单选题】下列选项中属于现代教学媒体的是( )
A.
标本
B.
挂图
C.
网络教室
D.
模型
【单选题】Small firms do not have specific training budgets because
A.
they do not want to invest in training.
B.
they do not have time to provide training.
C.
they do not plan their training.
D.
they do not have professional guidance.
【单选题】Something Men Do Not Like to Do Eric Brown hates shopping. 'It's just not enjoyable to me,' said the 28-year-old Chicago man who was carrying several shopping bags along the city's main. street,Michig...
A.
playing
B.
fishing
C.
shopping
D.
going
【单选题】下列属于现代教学媒体中视觉媒体的是()。
A.
教学挂图
B.
投影仪
C.
标本
D.
MP3
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