禁止船舶向内河水域排放废油、残油、货物残渣和船舶垃圾。
参考答案:对
The early pioneers had to many hardships to settle on the new land.
A.go along with
B.go back on
C.go through
D.go into
落水者体温下降的速度只取决于水温和采取自救的方法。()