开口闪点仪一般用来测定重质油料,闭口闪点仪只对轻油品适用。
参考答案:错
解析:开口闪点仪一般用来测定重质油料如润滑油、残油等,闭口闪点仪则对轻、重油品都适用。
They have not made any decision on ______ they are going to do to deal with the waste and control pollution.
A.that
B.which
C.if
D.what
对航空器局部安保检查,重点是离机旅客的前后3排。()