对未放置检验合格标志上道路行驶的车辆，交通警察可依法予以扣留。
参考答案：对
Some miners are trapped when the local mine was flooded，but luckily，400 kilograms of milk ________to them during the rescue．
A．got through
B．brought down
C．gave away
D．gave out
煤氧化后煤的发热量会（）。
A.降低
B.升高
C.不变
D.无法判断
