郑和下西洋成为中国历史上时间最长、规模最大、范围最广的商务活动。()
参考答案:对
----- Jack, is there __________ in today’s newspaper? ----- No, nothing.
A.anything important
B.something important
C.important anything
D.important something
矿用钢丝绳的绳股多为8股。()