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【判断题】
标准溶液是已知浓度的试剂溶液。A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】X线管阳极柄的作用是:( )
A.
传递、散发热量，支撑和固定Ｘ线管
B.
传递、散发热量
C.
传递、散发热量，保持真空
D.
传递、散发热量，支撑阳极
E.
传递、散发热量，支撑玻璃壳
【单选题】What can we infer from Jean Cassingena's comment that 'We have to bring about a revolution in opinion' ?
A.
They should re-recruit older workers back to the company.
B.
Older workers are still productive, no less than when they were young.
C.
They should pay attention to training more young staff.
D.
They will discuss with employment agency about the manpower issue.
【简答题】Read and judge. Ellen: What are you reading, Jean? Jean: Oh, I am reading a book about the life in the year 2050. Ellen: Life in the year 2050? What will happen? Jean: Well… the book says every family...
【单选题】X线管阳极柄的作用是:()
A.
A .传递、散发热量,支撑和固定X线管
B.
传递、散发热量
C.
C .传递、散发热量,保持真空
D.
传递、散发热量,支撑阳极
E.
E .传递、散发热量,支撑玻璃壳
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