题目内容

简述脱文的原因。

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汽轮机单阀和顺序阀在切换过程中可以中间终止切换,恢复原运行方式。()

A. 正确
B. 错误

Which of the following data network would you implement if you wanted a wireless network that had a relatively high data rate, but was limited to very short distances?()

A. Broadband personal comm. Service (PCS)
Broadband circuit
C. Infrared
D. Spread spectrum
E. Cable

根系的水平分布范围,在正常情况下,多数与树木的()大小相一致,施肥应在树冠外围于地面的水平投影处()施肥,才有利养分充分吸收。

试述清代的地丁合一制度。

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