预真空压力蒸汽灭菌器的装载量不得超过柜室容积的多少()
A.75%
B.80%
C.85%
D.90%
E.95%
参考答案:D
Which of the following condition is least likely to be the reason that a black market is generally inefficient()
A. Unenforceable contract.
B. Increased prices required by suppliers due to the risk of prosecution.
C. Intensive control by the government.
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