型号为“SKY77331”功放内部集成了功控IC、发射耦合器、功率检波二极管。()
查看答案
制订本校的学校体育与健康课程实施计划应包括哪些方面的内容(至少6条)?
多人作业时,现场安全负责人如遇无法消除的重要安全隐患或突发险情时,没有权利下达人员撤离指令。
A. 正确
B. 错误
变电所计算机监控系统UPS电源过负荷能力:带150%额定负荷运行多少时间,带125%额定负荷运行多少时间()
A. 30s,60min
B. 60s,20min
C. 60s,10mi
As a vessel falls off the wind from close-hauled to a beam reach,the tendency for the vessel to move sideways through the water will().
A. increase
B. decrease
C. change only if the vessel comes about on the opposite tack
D. not change