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【单选题】
You won't feel the _______ of so many trees if people continue to cut___________. [ ]A.
beautiful; them down
B.
beauty; them down
C.
beautiful; down them
D.
beauty; down them
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【单选题】The weather seemed perfect ______ fishing that day, I remember. [ ]
A.
to
B.
in
C.
for
D.
at
【简答题】使两构件通过点或线接触形成的运动副叫 。
【简答题】两构件通过点或线接触形成的运动副称为 。
【简答题】两构件通过( )或( )接触形成的运动副称为高副。
【简答题】8-3 假设外部数据存储器2000H单元的内容为80H,执行下列指令后: MOV P2,#20H MOV R0,#00H MOVX A,@R0 累加器A中的内容为()
【简答题】The other day I decided to come home early because it was such a beautiful day. The were outside playing in my apartment complex (公寓大楼) and the ice cream truck was whistling its tune. As I slowly to a...
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