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【多选题】
下图所示电路中,在保持R1和R2不变的情况下,当增大R3时,a b两点电位的变化是A.
Va 变高
B.
Va 变低
C.
Vb 变高
D.
Vb 变低
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【单选题】Laura Bush believes that if women cannot receive education, they cannot make contribution to the society.
A.
Y
B.
N
C.
NG
【单选题】Most dictionaries will tell you a number of【21】about a language. There are three things in particular that【22】important. These three things are spelling, pronunciation, and meanings. The first and mos...
A.
books
B.
people
C.
things
D.
thing
【单选题】《中药品种保护条例》规定，中药一级保护品种的保护期限分别为()。
A.
三十年、二十年、十年
B.
二十年、十五年、十年
C.
二十年、十年、八年
D.
二十年、十年、五年
E.
十年、五年、三年
【单选题】Why can' t we provide as many houses as needed?
A.
Because we cannot make the choice.
B.
Because we do not have enough resources.
C.
Because we do not have a free housing market.
D.
Because education is more important than housing.
【单选题】Most dictionaries will tell you a number of【21】about a language. There are three things in particular that【22】important. These three things are spelling, pronunciation, and meanings. The first and mos...
A.
thing
B.
people
C.
things
D.
books
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