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【判断题】
贵州西部的草海被誉为“的明珠”。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】单片机系统由几部分组成,请简单概述。 简述机器语言、汇编语言和高级语言的区别。 震荡周期、状态周期、机器周期、指令周期四者之间的时间关系,并表示出来。
【单选题】Today the forests are getting fewer and fewer. We must _______ down too many trees.
A.
keep people from cutting
B.
prevent people from cutting
C.
stop people cutting
D.
all the above
【单选题】Today, the forests have almost gone. People must ______ down too many trees.
A.
stop from cutting
B.
be stopped to cut
C.
be stopped from cutting
【单选题】Today, the new forests along the Hah River play an important role in regulating the region's climate.
A.
Y
B.
N
C.
NG
【简答题】In 1620, about half the USA was covered by forests． Today the forests have almost gone． A lot of good land has gone with them, leaving only sand． China doesn’t want to copy the USA’s example． We’re pl...
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