【名词&注释】
混合物(mixture)、硫酸铝(aluminum sulfate)、分类法(classification)、小苏打(sodium bicarbonate)、中秋节(autumn holiday)、好朋友(good friends)、非金属元素(nonmetal elements)
[单选题]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【】
A. 非金属元素(nonmetal elements)：Mg、F、Si
B. 盐：纯碱、小苏打、硫酸铝
C. 混合物：空气、石油、冰水共存物
D. 合成材料：塑料、羊毛、合金
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举一反三：
[单选题]海拔2000~3000米，起伏和缓，边缘陡峭的地形是 （ ）
A. 山地
B. 高原
C. 丘陵
D. 平原
[单选题]48． Sorry，we don-t have the coat_________ you need．
A. what
B. who
C. whom
D. which
[单选题]You’d better look up the new word in a dictionary _____ you don’t know it ?
A. if
B. that
C. though
D. whether
[单选题]46_______.
A. paid
B. took
C. cost
D. spent
[单选题]There is going to be a wonderful party __________ the evening of October 1st, 2009.
A. in
B. on
C. at
D. for
[单选题]8．—Can we _______ ping-pong?—No，_______ tennis．
A. play; let's play
B. plays; let's play
C. play; let's to play
D. plays; let's to play
[单选题]22． Last year they became good friends again __________ after they didn’t talk with eachother for a long time．
A. on Mid-Autumn Day
B. the day before Mid-Autumn Day
C. the day after Mid-Autumn Day
D. two days before Mid-Autumn Day
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