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【简答题】
某正弦电压有效值为380V，频率为50Hz，计时始数值等于380V，其瞬时值表达式为（）
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【简答题】Why did the police want to take Bod to the station house?
【多选题】为了提升系统的安全性,以免遭病毒或者黑客入侵,某同学采取如下措施,你认为不合理的做法是( )
A.
多装几套防病毒软件
B.
及时打系统补丁
C.
彻底断开网络，只用U盘或者其它介质传递信息
D.
仔细配置防火墙，尽可能关闭不用的服务
【单选题】Why did the station manager take on Les Brown to do small tasks at last?(3分)
A.
Becausse Les Brown was talented.
B.
Because Les Brown's efforts were impressive.
C.
Becausse Les Brown asked for no salary.
D.
Becausse Les Brown was diligent.
【简答题】Why did his face look pale in the service station?
【单选题】Mr. Black has already paid the advance deposit and now he is back at the nurse station and choose the best answer to each question you hear. Why did the nurse take Mr. Black to his ward in person?
A.
Because she’s warm-hearted.
B.
Because the patient has never been to this hospital before.
C.
Because Mr. Black has never been to hospital before.
D.
Because the patient is blind.
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