液化气的气相密度和液相密度不同的原因是().
A.温度不同.
B.组成不同.
C.状态不同.
参考答案:B
根据句意,在答题卡标有题号的横线上,写出括号内所给单词的适当形式。
小题1:Everyone was in a state of great (excite)when they heard the good news.
小题2:I’m afraid it will be much ( rain ) later in the evening.
小题3:Lucy is a (live) child and popular with everyone.
小题4:The terrible accident _________ (effect) him a lot and changed his dream of life.
雨天对安全行车的主要影响是什么
A.电器设备易受潮短路
B.路面湿滑,视线受阻
C.发动机易熄火
D.行驶阻力增大