采用同步器的目的是使接合套与待啮合的齿圈迅速同步,缩短换挡时间,换挡方便。
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被审计单位收到《内审结论和处理决定》后,应在()内将整改情况报内审派出行。
A. 两个月
B. 一个月内
C. 15日内
Where a charter-party specifies the estimated time of arrival of a vessel at the port of loading,there is()obligation on the shipowners to sail to there on the date on which when proceeding with all convenient speed it would normally reach the port on or about the estimated date of arrival.
A. an optional
B. a reasonable
C. an absolute
D. rational
光纤通信系统中,短波长波段为()波长。
A. 0.8-0.9um
B. 0.7-0.6um
C. 0.3-0.4um
D. 0.2-0.3um