Working by chemical reaction, and being independence of atmospheric oxygen, rockets are
used to power interplanetary space vehicles.
答案是“B”, of 前不就是加名词么?有什么问题??
Wind and oceans currents may move icebergs thousands of kilometers from their source.
答案是“A”, 为什么?ocean是不可数名次还是可数名次??
谢谢!!
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of 前面加名词,? 没有一定如此啦. be independent of 固定搭配, be+ 形容词+介词结构
ocean 是countalbe noun. 不过这里做定语修饰currents 所以应该用单数.
同意bryonyGG的讲解
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