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【单选题】
:Word 2010中复制文字格式,而不复制字符,需用()功能按钮( 2 分)A.
“开始”选项卡下，“剪贴板”功能区中的“格式刷”按钮
B.
“开始”选项卡下，“字体”功能区中的“格式刷”按钮
C.
“开始”选项卡下，“段落”功能区中的“格式刷”按钮
D.
“开始”选项卡下，“编辑”功能区中的“格式刷”按钮
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【单选题】He appears ______ a long time. He is impatient for my arrival.
A.
to wait
B.
to be waiting
C.
to have waited
D.
to have been waiting
【简答题】试分别从导电的机制与能带的观点说明什么是本征半导体、N型半导体和P型半导体。
【单选题】George appears______a hard time convincing his employer that he is right over it.
A.
having
B.
to be having
C.
to have
D.
having had
【单选题】California appears to benefit most from daylight saving time because ___________.
A.
the weather there is windy
B.
it is close to the Pacific Ocean
C.
people there tend to stay outdoors later
D.
people there have more time to do exercise
【判断题】If time appears in the lead of a news story, it typically appears after, not before, the who and what .
A.
正确
B.
错误
【简答题】Suddenly the door bursts open and the Time Traveler appears, dirty, disheveled, and bedraggled, with a nasty cut on his chin.
【简答题】什么是本征半导体?什么是杂质半导体?以示意图表示它们的能带结构。说明半导体是如何导电的。
【简答题】什么是本征半导体，P型半导体、N型半导体？并写出本征半导体的费米能的计算式。
【简答题】挡土墙防护的形式有哪几种?
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