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【单选题】
离心泵内液体不发生冲击损失的条件是实际流量必须( )。A.
大于设计流量
B.
小于设计流量
C.
等于设计流量
D.
流量不变
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反馈参考答案：
举一反三
【简答题】（）是第一个由世界医学协会所采用的，涉及人体的医学研究道德原则的伦理文件，是涉及人的生物医学研究的国际指导伦理文件。
【单选题】听力原文：If you are not able to pay cash for the television set you can make arrangements with the credit manager for twelve payments. (26)
A.
You can buy the television set on installment.
B.
You can arrange to use the television set for twelve months.
C.
You must pay cash for the television set.
D.
You can return the television set to the credit manager after twelve months.
【单选题】第一个由世界医学协会所采用的涉及人体的医学研究道德原则的伦理文件是( )
A.
《纽伦堡法典》
B.
《涉及人的生物医学研究的国际伦理准则》
C.
《赫尔辛基宣言》
D.
《涉及人的生物医学研究伦理审查办法（试行）》
【单选题】听力原文：M: How long can I keep the book? W: Three weeks, but you can renew it if you need it for a longer time. Q: What is the possible relationship between the speakers? (13)
A.
Professor and student.
B.
Shop assistant and customer.
C.
Librarian and reader.
D.
Two friends.
【单选题】听力原文：M: How long can I keep the book? W: Three weeks, but you can renew it if you need it for a longer time. Q: What is the possible relationship between the Speakers? (13)
A.
Professor and student.
B.
Shop assistant and customer.
C.
Librarian and reader.
D.
Two friends.
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