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2. Even though the pure water is what gives sea water its main properties, the salinity of the sea water affects both its weight and freezing point.

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1. Life in the oceans ranges from the tiniest plankton all the way up to giants like sharks and whales.

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1. benefit   2. planets  3. decreased   4. freezes   5. sensitive   6. substance   7. unique   8. absorbed    9. distance    10. fiction

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(略)

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1. which there is   2. is it that   3. what…… effect on……

Key to 高二(下)Unit 13词汇测试

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1. are àis  2. so àas  3. 第二个whichàwhat   4. riseàraise  5. makeàmaking   6. how àthat/ in which   7.frozen àfreezing   8. getting àget   9. protectàprotecting   10. steadilyàsteady

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1-5: BCDAC   6-10: ADDBA  11-15: ACCAD   16-20: BCCDA   21-25: BDDCA

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1、turn … upside down
11、give off
2、come up with…
12、benefit from/ by
3、call in
13、be made up of
4、range from…all the way to…
14、a drop of rain
5、that is to say
15、mix up
6、break down
16、play a trick on …
7、take advantage of
17、become available to
8、be sensitive to
18、do the work
9、a variety of
19、make notes of
10、contribute to….
20、compare …to …

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7、  现在的食品物价在5美元至50美元之间。 (range between… and…)

Key to高二(下)自编练习Unit 13 (SB2B):

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6、  物价随季节而变动。 (vary with……)

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