地槽经过一个或几个()后,逐渐失去活动性。地壳上,这种相对稳定的构造单元叫()。
参考答案:构造旋迴;地台
—My sports shoes are nicer than yours? —Yes, but mine are _____ yours.[ ]
A. comfortable
B. more comfortable
C. the most comfortable
D. as comfortable as
消防泵机运转时,可能造成哪些伤害?