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【单选题】
关于顺序图，下列说法不正确的是（）A.
顺序图的组成为对象（参与者）、消息、生命线、激活
B.
时间维由上至下表示
C.
对象的排列顺序很重要
D.
对象的表示正常 / 匿名
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皮皮学刷刷变学霸
举一反三
【单选题】The marginal benefit Claire gets from purchasing a third pair of flip-flops is
A.
the same as the total benefit of purchasing three pairs of flip-flops.
B.
more than the marginal cost of purchasing the third pair of flip-flops.
C.
the total benefit Claire gets from purchasing three pairs of flip-flops minus the total benefit she gets from purchasing two pairs of flip-flops.
D.
the total benefit Claire gets from purchasing four pairs of flip-flops minus the total benefit she gets from purchasing three pairs of flip-flops.
【单选题】For an edge-triggered D flip-flop, ( )
A.
a change in the state of the flip-flop can occur only at a clock pulse edge
B.
the state that the flip-flop goes to depends on the D input
C.
the output follows the input at each clock pulse
D.
all of these answers
【单选题】The flip-flop used in a CPLD macrocell can be programmed as a
A.
D flip-flop
B.
J-K flip-flop
C.
both (a) and (b)
D.
neither (a) nor (b)
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