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【单选题】
在实验动物饲料灭菌中有一种方式，能有效地摧毁微生物，也不会在饲料中留下残留量，并且对营养成分破坏极小。它也是饲料灭菌的最佳选择，这种方式是（）。A.
高压
B.
熏蒸
C.
辐照
D.
日照
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举一反三
【单选题】Exercise: Choose a proper phrase in its appropriate form to filleach blank in the following sentences. pay for pay back pay into pay out 1. I _______ a lot of money for that car.
A.
pay for
B.
pay back
C.
pay into
D.
pay out
【简答题】A．To introduce the categories of books in the US libraries. B．To explain roles of different US libraries. C．To define the circulation system of US libraries. D．To demonstrate the importance of US libr...
【简答题】A．To introduce categories of books in US libraries. B．To demonstrate the importance of US libraries. C．To explain the roles of different US libraries. D．To define the circulation system of US librarie...
【多选题】下列哪些与吗啡相符
A.
能加强大脑皮质的兴奋过程，用于中枢性呼吸衰竭
B.
化学结构属于生物碱类化合物
C.
制备注射液时，常与盐酸成盐
D.
因是生物碱类化合物，所以具有马奎斯反应
【单选题】Which of the following is an accurate statement?______.
A.
Women generally pay higher insurance premiums than men.
B.
Women generally pay lower life insurance and accident insurance premiums but often pay higher health insurance premiums than men.
C.
Women generally pay lower life insurance and health insurance premiums but often pay higher accident insurance premiums than men.
D.
The Supreme Court has ruled that insurance companies must charge men and women of the same age equal rates.
【单选题】The main purpose of the talk is
A.
to introduce categories of books in US libraries.
B.
to demonstrate the importance of US libraries.
C.
to explain the roles of different US libraries.
D.
to define the circulation system of US libraries.
【单选题】What is the main purpose of the talk?
A.
To introduce categories of books in the U. S. libraries.
B.
To demonstrate the importance of the U. S. libraries.
C.
To explain the roles of different U. S. libraries.
D.
To define the circulation system of the U. S. libraries.
【多选题】The main purpose of this letter is to______.A．introduce the library's service to readersB．recommend new books to the readersC．send a few catalogues to readersD．express thanks to the readersE. how to u...
A.
A正确
B.
B正确
C.
C错误
D.
D错误
E.
E错误
【单选题】Which of the following is NOT the requirement on a visitor to an ancient village?
A.
Pay an entrance fee.
B.
Make no noise.
C.
Not littering.
D.
No singing.
【单选题】Which of the following does not belong to variable-pay programs?( )
A.
Piece-rate pay
B.
Merit-based pay
C.
Skill-based pay
D.
Fixed pay
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