船舶应尽可能避免在下列哪些区域内锚泊？（）
A.在通航分道内或其端部附近
B.在分隔带内
C.A＋B
D.A、B均不对
参考答案：C
真空中光速约为c=______m/s，太阳光传到地球约需500s，由此可知日地距离约为______m．
The schools in the flooded areas were________with free books by the government. [ ]
A. given
B. offered
C. sent
D. provided
