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听力原文：W：Harry，what's the matter? You look pale. M：I just had a terrible experience. W：Did you have an accident? M：Not quite，but almost. I was crossing the street just now and was almost hit by a car. Fortunately，I jumped back in time． W：How awful! I hope you got the number of the car，so you can report this man to the police. M：Before I realized what had happened，the car was gone. W：Drivers like that should be punished by the police. M：I agree. I won't forget this for a long time. W：I am sure you won't. M：Yes，from now on I won't cross the street reading my newspaper. I'll have to watch where I'm going, since there are dangerous drivers like that one on the road. (8)A.
Because he was too tired.
B.
Because he was injured in a traffic accident.
C.
Because he was almost hit by a car and felt frightened.
D.
Because he was ill.
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【简答题】已知：对于实数a，只有一个实数值x满足等式 x+1 x-1 + x-1 x+1 + 2x+a+2 x 2 -1 =0 ，试求所有这样的实数a的和．
【单选题】劳动合同期限三个月以上不满一年的,试用期不得超过一个月;劳动合同期限一年以上不满三年的,试用期不得超过二个月;三年以上固定期限和无固定期限的劳动合同,试用期不得超过 ( ) 个月。试用期包含在劳动合同期限内。
A.
2
B.
3
C.
5
D.
6
【单选题】已知2a∈A，a 2 -a∈A，若A含2个元素，则下列说法中正确的是（ ）
A.
a取全体实数
B.
a取除去0以外的所有实数
C.
a取除去3以外的所有实数
D.
a取除去0和3以外的所有实数
【简答题】对于实数a，只有一个实数值x满足等式 x+1 x-1 + x-1 x+1 + 2x+a+2 x 2 -1 =0 ．试求所有这样的实数a的值．
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