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【判断题】
纯净的具有晶体结构的半导体称为本征半导体,两种载流子的浓度相等。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】动圈式振动传感器，其输出感应电动势e与线圈相对于磁场的（）呈正比。如在测量电路中接入（）电路和（）电路，还可用于测量振动的位移加速度。
【多选题】下列关于肱二头肌长短头起止点的描述,正确的是?
A.
长头起于肩胛骨盂上结节,肌腹与短头汇合,止于桡骨粗隆
B.
短头起于肩胛骨喙突,肌腹与长头汇合止于桡骨粗隆
C.
长头起于肩胛骨盂下结节,止于桡骨粗
D.
短头起于肩胛骨喙突,止于尺骨胫突
【单选题】The voice from the union accused Ofcom that______.
A.
it has gone beyond its responsibility in some terms and conditions
B.
it has interfered with its members' relations with Communication union
C.
it has used efficiency to drive down service standards in the UK
D.
it has overstepped the remit to control most productive workers
【简答题】演播室布光方法中的三点布光法指的是运用______、______和______三种基本光线进行照明布光，把三维物体的立体感、质感和纵深感的基本造型呈现在二维的电视屏幕上。
【简答题】对于线振动速度传感器,其输出的( ) 正比于被测速度。
【单选题】听力原文：Let me know as soon as you arrive here. I would like to see to it that you are properly received and taken care of. What does the speaker imply?
A.
I would like to see you properly.
B.
I would like to take proper care of you.
C.
I don't expect when you will arrive.
D.
I'll make sure you are properly looked after.
【单选题】I'd like to arrive 20 minutes early ______ I can have time for a cup of tea.
A.
as soon as
B.
as a result
C.
in case
D.
so that
【简答题】为什么升高温度和使用适当的催化剂可以加快反应速率?
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