正确答案: B
盐:纯碱、小苏打、硫酸铝
题目:分类法是化学学习和研究的重要方法之一。下列分类正确的是【】
解析:B
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举一反三的答案和解析:
[单选题]海拔2000~3000米,起伏和缓,边缘陡峭的地形是 ( )
高原
[单选题]48. Sorry,we don-t have the coat_________ you need.
which
解析:48.D【解析】句意:很抱歉,我们没有你需要的大衣.先行词coat是物,用which作关系代词.
[单选题]You’d better look up the new word in a dictionary _____ you don’t know it ?
if
[单选题]46_______.
spent
[单选题]There is going to be a wonderful party __________ the evening of October 1st, 2009.
on
[单选题]8.—Can we _______ ping-pong?—No,_______ tennis.
play; let's play
解析:8.A【解析】情态动词can后跟动词原形;let's后也跟动词原形。
[单选题]22. Last year they became good friends again __________ after they didn’t talk with eachother for a long time.
on Mid-Autumn Day
解析:22.A【解析】从第一段第三、四句可知他们在中秋节那天再次成为好朋友。