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【简答题】
设全集是数集U={2，3，a 2 +2a-3}，已知A={2，b}，? U A={5}，求实数a，b的值．
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举一反三
【单选题】Questions 16 to 18 are based on the passage you have just heard.
A.
Watching TV at home.
B.
Meeting people.
C.
Drinking coffee.
D.
Trying new foods
【单选题】Questions 16 to 18 are based on the passage you have just heard.
A.
Because he had run out of gas.
B.
Because his tires were stabbed.
C.
Because he had heard a noise.
D.
Because he was attracted by Mrs. Jones.
【简答题】谵语 名词解释
【简答题】名词解释 语音共振
【单选题】Questions 16 to 18 are based on the passage you have just heard.
A.
They are larger than many other species.
B.
They can cause damage to people’s homes.
C.
They can survive a long time without water.
D.
They like to form colonies in electrical units.
【简答题】名词解释 语言 言语
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