【单选题】Let's make a long rope by tying the two ropes together with a secure _______.
【单选题】----.Let’s go to find our manager in his office. ----It’s so late at night .He be there . Let’s make it another day .
D.
ought not to have been
【单选题】适用于在一定范围内公布应当遵守或者周知的事项的公文是
【判断题】炸药化学变化的三种形式包括炸药的氧化、燃烧和爆轰。 ( )
【单选题】可燃性液体和固体的燃烧形式不包括( )。