下面关于氢气的物理性质的叙述,不正确的是()
A、在通常状况下,氢气是无色、无味的气体
B、氢气是最轻的气体
C、在某些条件下,氢气可以变成固体
D、氢气易溶于水
参考答案:D
—Do you think it a good thing if too high house prices can't be brought under control .
—________,it was bad.
A.In other words
B.On the other hand
C.On the contrary
D.In the meanwhile
常被摄影采用的促进剂有()
A.硼砂
B.碳酸钠
C.苛性碱
D.菲尼酮
E.硫氧