题目内容

STC89C51单片机内部RAM有存储空间,内部ROM有存储空间。

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单片机4个并行口既可以按操作,也可以按操作。若将P1.0置1,应采用的语句分别是和________。

Oil is an important _____ material, which can be processed(加工) into many different chemical products, including plastics.

A. primary
B. raw
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A. elbowed
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This _____ can be used to measure sea surface temperatures.

A. vehicle
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