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【单选题】
肯德基的创始人哈兰.山德士大叔60多岁创业,经历1009次然后才成功的故事,说明了()。A.
理想的实现是个长期曲折的历程，唯有坚定信念，不断努力，取得最后成功。
B.
确立目标后，只要坚持，没有不成功的，所以坚持到底肯定就是胜利。
C.
人生在世，不如意事常有八九，实现人生理想需要奋斗，但是更要靠天意，肯德基的成功终究是天意决定，否则失败1也没有用。
D.
山德士大叔成功是因为他在美国，换个地方结果就不一定了，所以一个人成功的受制因素很多，外部制度是决定因素。
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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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