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【单选题】
顶置式气门的气门间隙调整部位是在( )。A.
上
B.
推杆上
C.
摇臂上
D.
凸轮轴上
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举一反三
【单选题】Which of the following is NOT a cause of the fall of gasoline price?
A.
Less people take vacations in winter.
B.
The cost for producing gasoline is lowered.
C.
The stock of gasoline is a little higher.
D.
There are few natural disruptions.
【单选题】After we boarded the boat, it went on down the river, stopping ____ to take people in.
A.
more or less
B.
now and then
C.
sooner or later
D.
up and down
【单选题】Less ambitious people tend to take ___________ than very driven people.
A.
less advice
B.
more time decision-making
C.
fewer risks
【简答题】若内部RAM 30H单元内容为10H,20H单元内容为30H,P1口作为输入口,其输入的数据为F4H,下列程序段执行后(R1)=( )H、(30H)=( )H、(R0)=( )H、(A)=( )H、(B)=( )H、(P2)=( )H MOV R0,#20H MOV A,@R0 MOV R1,A MOV B,@R1 MOV @R1,P1 MOV P2,P1
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