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【多选题】
下列有关电源短路的叙述正确的是()。A.
电路中电流剧减
B.
电路中电流剧增
C.
电路中电压为零
D.
电路是电压剧增
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【单选题】—What's your favorite subject? —Among all these subjects, I like English . [ ]
A.
well
B.
good
C.
better
D.
best
【简答题】听句子，选择你所听到的答语。 ( ) 1. A. Yes, I like these shoes. B. No, I like those shoes. ( ) 2. A. They speak Chinese. B. They speak English. ( ) 3. A. It's about ten hundred kilometres. B. It's about...
【单选题】有受体型和非受体型的蛋白激酶是
A.
cGMP依赖的蛋白激酶
B.
酪氨酸蛋白激酶
C.
cAMP依赖的蛋白激酶
D.
Ca2+磷脂依赖的蛋白激酶
E.
钙调蛋白依赖的蛋白激酶
【单选题】I like these English songs and they______ for many times on the radio.
A.
taught
B.
have taught
C.
have been taught
【单选题】I like these English songs and they_____for many times on the radio.
A.
taught
B.
have taught
C.
are taught
D.
have been taught
【单选题】It is well-known that time is money. That is the reason why almost everyone makes full use of their time.
A.
spends
B.
expends
C.
facilitates
D.
utilizes
【单选题】The reason why the laser beam is very strong is that
A.
it is artificially illuminated
B.
it is made up of a concentrated beam of light
C.
it sends out heat in all directions
D.
its heat is increased by the heat of the sun
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