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【单选题】
正立方体的顶角上作用着六个大小相等的力,此力系向任一点简化的结果是A.
主矢不等于零，主矩也不等于零
B.
主矢等于零，主矩也等于零
C.
主矢等于零，主矩不等于零
D.
主矢不等于零，主矩等于零
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【简答题】执行( )是防止电气误操作事故的重要手段 A、操作票制度 B、操作监护制度 C、交接班制度 D、工作票
【单选题】经济周期的四个阶段依次为( )
A.
繁荣 . 衰退 . 萧条 . 复苏
B.
衰退 . 萧条 . 繁荣 . 复苏
C.
萧条 . 衰退 . 复苏 . 繁荣
D.
复苏 . 萧条 . 衰退 . 繁荣
【单选题】A client has been hospitalized with a diagnosis of myasthenia gravis. A friend is visiting the client during lunch. The nurse enters the room after the client recovered from choking on lunch. What sho...
A.
Instruct the client to sit at a 30-degree angle in bed when eating.
B.
Tell the client to swallow when her chin is tipped down on her chest.
C.
Remind the client to rest after eating.
D.
Encourage the client to eat alone
【简答题】After a UDP calls the function connect(), one can capture ( ) packets by wireshark.
【简答题】As the only direct steamer that calls at our port once a month has just departed, goods can only be shipped next month.
【简答题】The CMR convention has been ratified only by countries in（ ）．
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