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【简答题】
Rewrite the following sentence so that they are positive rather than negative in tone. 1. Unfortunately, your order cannot be sent until next week. 2. To avoid the loss of your credit rating, please remit payment within 10 days. 3. Your misunderstanding of our January 8 letter caused you to make this mistake. 4. Your cannot visit the plant except on Saturday. 5. Our material won’t do the job unless it is reinforced. 6. Your negligence in this matter caused the damage to the equipment. 7. We regret to inform you that we cannot permit you to use our clubhouse for your meeting on Saturday, as the Boy Corp asked for it first. We can, however, let you use our conference room, but it seats only 60. 8. We regret to inform you that we must deny your request for credit.
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【判断题】When both the J and K inputs are HIGH, an edge-triggered J-K flip-flop changes state on each clock pulse.当J和K输入端都为高电平时，边沿触发的JK触发器在每个时钟脉冲都会改变状态。
A.
正确
B.
错误
【判断题】(True or false) When both the J and K inputs are HIGH, an edge-triggered J-K flip-flop changes state on each clock pulse.
A.
正确
B.
错误
【判断题】A pulse-triggered flip-flop is identified by a bubble on its Q output terminal.
A.
正确
B.
错误
【单选题】For an edge-triggered D flip-flop,对边沿触发的D触发器，
A.
a change in the state of the flip-flop can occur only at a clock pulse . 触发器状态的改变仅在时钟脉冲处发生。
B.
The state that the flip-flop goes to depends on the D input . 触发器的状态如何转换由D输入端决定。
C.
The output follows the D input at each clock pulse . 每个时钟脉冲处，输出都跟随输入D变化。
D.
All of these answers . 所有答案都对。
【单选题】(Single choice)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
【简答题】电场可能与圆柱的侧面垂直,是否?(__)
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