当污染物集中于某处发生时,最有效的治理污染物对环境危害的通风方式是( )。
A.机械进风
B.局部送风
C.局部排风
D.自然通风
参考答案:D
The German athlete, ________ several attempts to beat the world record in high jumping, decided to have another try.
A.to make
B.having made
C.making
D.made
“仓庚于飞,熠耀其羽”中“仓庚”指的是()。
A、水鹳
B、黄鹂
C、大雁
D、乌鸦