∫sin5xdx等于().
A.A
B.B
C.C
D.D
参考答案:A
In order to help the police, the eyewitness described what he had seen very carefully not to______ any key clues.
A.cut off
B.leave off
C.squeeze out
D.leave out
图为“我国南方某小区域地形图”,图中等高距为100米,瀑布的落差为62米,据此完成问题。
关于瀑布的说法正确的是()
A.瀑布水量季节变化大
B.逐渐向湖泊退缩
C.逐渐向下游推进
D.冬季成“冰瀑”