1.选择题- (共6题)
3.
如图所示为某传感装置内部部分电路图,RT为正温度系数热敏电阻,其特性为随着温度的升高阻值增大;R1为光敏电阻,其特性为随着光照强度的增强阻值减小;R2和R3均为定值电阻,电源电动势为E,内阻为r,V为理想电压表.若发现电压表示数增大,可能的原因是( )
①热敏电阻温度降低,其他条件不变
②热敏电阻温度升高,其他条件不变
③光照减弱,其他条件不变
④光照增强,其他条件不变.
4.
如图所示为某传感装置内部部分电路图,RT为正温度系数热敏电阻,其特性为随着温度的升高阻值增大;R1为光敏电阻,其特性为随着光照强度的增强阻值减小;R2和R3均为定值电阻,电源电动势为E,内阻为r,V为理想电压表.若发现电压表示数增大,可能的原因是( )
①热敏电阻温度降低,其他条件不变
②热敏电阻温度升高,其他条件不变
③光照减弱,其他条件不变
④光照增强,其他条件不变.
5.
如图所示,某电子电路的输入端输入电流既有直流成分,又有交流低频成分和交流高频成分.若通过该电路只把交流的低频成分输送到下一级,那么关于该电路中各器件的作用,下列说法中正确的有( )
2.单项选择- (共7题)
7.
_____ took me almost 20 years to have the courage to ask my father this personal question.
A.This | B.It | C.That | D.One |
9.
But for friction (摩擦力), people ______ neither walk, nor even stand up.
A.can | B.were able to | C.will be able to | D.could |
10.
When you feel you are happier and more relaxed after having a cigarette, you may become ________addicted.
A.physically | B.visually | C.mentally | D.endlessly |
11.
He was allowed to go swimming _______ he kept near the other boys.
A.on condition that | B.as far as | C.even if | D.as though |
12.
The troops _______ themselves to go into battle.
A.prepared | B.were prepared | C.to prepare | D.preparing |
13.
It was after he got what he had desired_____ he realized it was not so important.
A.that | B.when | C.as | D.since |
3.完形填空- (共1题)
试卷分析
-
【1】题量占比
选择题:(6道)
单项选择:(7道)
完形填空:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:8
7星难题:0
8星难题:0
9星难题:0