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【多选题】
OUT指令对于( )是可以使用的。A.
输入继电器
B.
输出继电器
C.
辅助继电器
D.
状态继电器
E.
输入触点
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【简答题】一阶 RC 电路的时间常数为 ;一阶 RL 电路的时间常数为
【简答题】一阶RC电路的时间常数τ = ;一阶RL电路的时间常数τ =
【简答题】房屋的套内建筑面积是指房屋的权利人单独占有使用的( ),它由套内房屋使用面积,套内墙体面积,套内阳台建筑面积三部分组成。
【单选题】(Unit1TextB课文段落)14. As soon as Weise started shooting, Jeff May thought, somebody ’ s got to stop this guy. At six-foot-three and 300 pounds, he realized he was one of the few kids who might have a ch...
A.
because he was more talented than his classmates.
B.
because he was more courageous than his classmates.
C.
because he had a gun.
D.
because he was tall and strong enough to fight against the gunman.