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【单选题】
安全生产许可证的有效期为( )年。安全生产许可证有效期满需要延期的，企业应当于期满前3个月向生产许可证颁发管理机关办理延期手续。A.
3
B.
1
C.
5
D.
2
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【简答题】When the pressure gets low, the boiling-point becomes low.
【简答题】When the pressure gets low, the boilling-point becomes low.
【简答题】操作系统的基本特性是
【判断题】As a rule ,when the pressure of the reservoir is high,the rate of production is low; but when the pressure is low,the rate is high.
A.
正确
B.
错误
【简答题】Changes in the prices of goods can cause changes in production and consumption. Production increases when the prices are high. As the prices of goods go up, producers make more goods because they can ...
【简答题】操作系统的基本特性是 、 、 、和 。
【单选题】When the costs of supplies increase in an industry, the low-cost leader
A.
may continue competing with rivals on the basis of product features.
B.
will lose customers as a result of price increases.
C.
will be unable to absorb higher costs because cost-leaders operate on very narrow profit margins.
D.
may be the only firm able to pay the higher prices and continue to earn average or above- average returns.
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