【判断题】斜长壁采煤法是长壁工作面沿走向推进的采煤方法。()
【判断题】倾斜长壁采煤法是长壁工作面沿走向推进的采煤方法。( )
【判断题】一平面力系作用于一刚体,这一平面力系的各力矢首尾相接,构成了一个自行封闭的力多边形,因此可以说该物体一定是处于平衡状态。
【简答题】Mr. Hamilton was considered as a hero because __________
【判断题】走向长壁采煤法是长壁工作面沿倾斜方向推进的采煤方法。( )
【单选题】The change hi Japanese life-style. is revealed in the fact that ______.
A.
the young are less tolerant of discomforts in life
B.
the divorce rate in Japan exceeds that in the U.S.
C.
the Japanese endure more than ever before
D.
the Japanese appreciate their present life
【单选题】如果通心粉价格上升而消费者购买更多的通心粉,我们就可以推断出( )
【单选题】生活中我们经常会看到“预存话费送手机”的广告。作为精明的消费者,我们应该理性看待这类优惠。商家“送”手机的根本动机是()
【判断题】走向长壁采煤法中采场煤壁是沿走向布置的.()
【简答题】Hamilton revealed his __________ design for the economic future of the United States.