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【单选题】
根据世界卫生组织(WHO)规定的噪音标准,白天病区较理想的噪音强度是A.
15～25dB
B.
25～35dB
C.
35～40dB
D.
40～50dB
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反馈参考答案：
举一反三
【单选题】Why did Kublai Khan fail each time when he sent a fleet to invade Japan?
A.
Because Japan was too distant from China.
B.
Because Kublai Khan was not be adequately prepared for the war.
C.
Because the soldiers didn't want to go to Japan.
D.
Because the troops of Kublai Khan met the typhoon.
【单选题】When did a Newtown Gas employee last read Saurabh Khan's meter?
A.
In February
B.
In March
C.
In April
D.
In May
【单选题】When did Salman Khan start devoting all his time to Khan Academy?
A.
In 2005.
B.
In 2009.
C.
In 2015.
【简答题】When did Khan el-Khalili begin to do business?
【简答题】What medicine is used by the doctors in Khan el-Khalili?
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