A.大小和方向都保持不变
B.大小不变,方向时刻改变
C.大小时刻改变,方向不变
D.大小和方向都时刻改变
答案:B
— I'd like to have a piece of bread and two eggs.
— Anything ______?[ ]
A. following
B. followed
C. to follow
D. to be followed
需要两个或更多的政府部门响应的紧急情况是()紧急情况。
A.特级
B.一级
C.二级
D.三级