填空题

A human body is composed of 50 trillion cells of a variety of types, all ______ (相互联系，相互依赖).

【参考答案】

all interrelated and interdependent

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填空题

In the vast country of ours there are large areas of fertile land which ______ (给我们以衣食之源).

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Now a nation-wide network for physical culture has been set up and expenditure on this field ______ ( 已列入国家预算之中).