【名词&注释】
营养价值(nutritive value)、生命力(vitality)、混合物(mixture)、硫酸铝(aluminum sulfate)、否定句(negative sentences)、细胞核(cell nuclear)、小苏打(sodium bicarbonate)、第一个(first)、非金属元素(nonmetal elements)、借助于(by means)
[单选题]小华安装好直流电动机模型，通电后电动机正常运转，她还想使电动机的转速加快，可采用的方法是( )
A. 增大电流
B. 减小电流
C. 对调电源正负两极
D. 对调磁体南北两极
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举一反三：
[单选题]AMy parents taught me not to waste food. My mom always found ways to make leftovers (剩余食物) taste good. I went to Ilan to learn about some of their special foods. As I was there, I learned about the food and the history of the area. I learned that they don’t waste food, either, and they use leftovers!
A. Many years ago, there was not enough food for everyone. People learned to cook and eat almost everything. They had to think of ways to make special dishes. One of these dishes is kao zha. It’s made with leftovers like meat, soup, oil and fat. That might not sound very good, but it does taste good. Today, kao zha is a special dish at big banquets (宴会).
B. Another famous dish is called zao bing. It’s made with fruit, meat and other things. I really liked it! But I didn’t want to eat too much. It has a lot of fat in it.
C. I smelled something burning and I saw smoke, so I found another special food of the Ilan area─duck meat. The duck meat is put in a big oven (炉子) to cook it. Smoke keeps the meat fresh. I don’t usually eat meat, but this duck meat was delicious! It tasted sweet.
D. Ilan is a great place with delicious food. I hope I can come back again!
E. 56. The writer learns from her parents __________.
F. not to eat leftovers B． to eat good food
G. not to waste food D． to make good food
[单选题]( ．． )2． My alarm clock _________at six every morning．
A. goes off
B. goes on
C. goes up
D. goes to
[单选题]将下列词语依次填人文中横线处，最恰当的一项是( ) (2分)
A. 不管 挺拔巍然
B. 尽管 挺拔巍然
C. 尽管 苍劲傲然
D. 不管 苍劲傲然
[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(sodium bicarbonate)、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
[单选题]下列对于细菌和真菌的叙述中，正确的是( )
A. 它们都过着寄生或腐生的生活
B. 它们都很小，必须借助于(by means)显微镜才能看见
C. 细菌都危害人体健康，真菌营养价值高，可以食用
D. 细菌没有成形的细胞核，真菌具有真正的细胞核
[单选题]37． —There's somebody at the door．_________ it be Jim?—No ,It __________be him． It's just seven o'clock．It’s too early．
A. May; can't
B. Will; won't
C. May; mustn’t
D. D Must; may not
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