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【多选题】
一下关于乙酰胆碱受体拮抗剂的叙述哪些是正确的A.
乙酰胆碱受体拮抗剂对乙酰胆碱受体具有高亲和性
B.
能与乙酰胆碱受体结合但无内在活性
C.
阻断乙酰胆碱或拟胆碱药与受体结合
D.
乙酰胆碱受体拮抗剂也被称为抗胆碱药
E.
可分为M乙酰胆碱受体拮抗剂和N乙酰胆碱受体拮抗剂两类
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【单选题】What is the reason why some writers work closely with film and TV producers? 查看材料
A.
To provide unique understanding about the original works.
B.
To supervise the work done by film and TV producers.
C.
The writers want to relax for a moment.
D.
The film and TV producers may not understand their work.
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【单选题】What can we infer from the first two sentences in the second paragraph?
A.
Producers can satisfy the consumers by mechanized production.
B.
Consumers can express their demands through producers.
C.
Producers decide the prices of products.
D.
Supply and demand regulate prices.
【单选题】Commodity users and producers mainly use futures contracts for what reason?______.
A.
To pay for expenses
B.
To find a buyer for their commodity
C.
To lock in a price
D.
All of the above
【单选题】What do major distributors do to push small independent producers out of market?
A.
Persuasion.
B.
Government relationships.
C.
Anti-competitive business practices.
D.
Adequate finance.
【单选题】What was the situation of the independent film producers?
A.
They were the highlights of the film festivals.
B.
Their works were popular in small theaters and rented halls.
C.
They were once on the fringes of the movie industry.
D.
Their works were given an important exposure.
【单选题】What about watching TY at home? It is .Let’s go fishing
A.
exciting
B.
erous
C.
popular
D.
boring
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