起重机械事故中,常见的重物失落事故有以下( )类型。

未分类题听力原文：M: The plane was supposed to arrive in Shenzhen at ten o'clock.W: Ten o'clock! But it's already ten-thirty!What does the woman mean?A．They're going to be very late.B．The plane doesn't fly near Shenzhen.C．Tile plane is going to land.

单项选择题垄断资本主义阶段的一个重要经济特征是( )。 A．商品输出 B．技术输出 C．资本输出 D．劳务输出

未分类题第一节 单项填空从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。______, we couldn't work in the small room where there is no air conditioner.A．Being a hot dayB．It being a hot dayC．It being hot a dayD．Because the day being hot

未分类题下列各项中有关乙炔气瓶在充装过程中,须注意的事项中正确的有( )。

未分类题证券公司禁止从事的行为包括( )。