扬尘是大气中漂浮着(),也叫飘尘。扬尘污染使大气可见度降低,雾天增多。A.烟尘 B. 发布时间:2017-07-23 13:26 │ 来源:www.tikuol.com 题型:单项选择题 问题: 扬尘是大气中漂浮着(),也叫飘尘。扬尘污染使大气可见度降低,雾天增多。A.烟尘B.固体和液体微粒C.水珠D.浓雾
题型:单项选择题 The little girl is seriously ill. Luckily we have decided to do ______ it takes to help.A.whicheverB.whateverC.wheneverD.however 查看答案