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35, The outstanding feature of copper and other metals of Group IB in the Periodic table is ____ chemical attack. A)resists;B)to resisting;C)their resistance to 为什么选c不选b？
37， A common way to produce x-rays is ___ electrons into a copper target. 为什么这题就可以选fired 不选by firing
能说一下介词后面加什么阿？动词的原型？还是doing什么时候加doing?
43, Including land and water, the state of Alaska ___ an area of 1.530.700 square kilometers, equal to about one-sixth of size of theUS. 答案是选has, 这里的equal to这句话坐镇么成分阿，equal不是动词么？
73， Light from the sun can penetrate only a few hundred meters below surface of the ocean.（below怎么改呢？）
101, The migration route of the first humans is occupy North America took them across a land bridge that once was connected ASIA with what is now Alaska.
110,A drought is a period of dry weather that lasts too long enough to cause a serious imbalance in the water cycle.
118, Although spaniards had explored upper california much earlier, they didnot attempt to settle there until the latter part the eighteenth century.
119, Althought copper was hammered into tolls and ornaments by some early inhabitants of North America, the smelting and casting of copper were unknown between them.
128, Loons, migratory aquatic birds, are expert swimming and divers, but walk on land with difficulty.
这些改错怎么改的？
还有请教yet，late, later ,last ,的用法区别。 | 
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发表于 2004-4-9 05:58:00
