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[单选题]
可编程器件FPGA也称为( )
A
可编程逻辑阵列
B
通用阵列逻辑
C
复杂可编程逻辑器件
D
现场可编程门阵列
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试题答案：
D
答案解释：
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对于共阳极七段显示数码管，若要显示数字“5”，则七段显示译码器输出abcdefg应该为（ ）
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1.
25．The Romantic Period, one of the most important periods in the history of American literature, stretches from the end of ______________ to the outbreak of ____________.
2.
14．1935 年 12 月，中国共产党召开的确定抗日民族统一战线新政策的会议是
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41.简述我国行政许可法的基本原则。
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22.Fifty volunteers were alphabetically divided into two equal groups, Group A to participate in a 7 week exercise program, and Group B to avoid deliberate exercise of any sort during those 7 weeks. On the day before the exercise program began, all 50 men participated in a step-test. This consisted of stepping up and down on a 16-inch bench at 30 steps a minute for 5 minutes. One minute after completion of the step-test, the pulse rate of each subject was taken had recorded. This served as the pretest for the experiment. For the next 7 weeks, subjects in the experimental group (Group A) rode an Exercycle (a motor-driven bicycle-type exercise machine) for 15 minutes each day. The exercise schedule called for riders to ride relaxed during the first day's ride, merely holding on to the handle bars and foot pedals as the machine moved. Then, for the next 3 days, they rode relaxed for 50 seconds of each minute, and pushed, pulled, and pedaled actively for 10 seconds of each minute. The ratio of active riding was increased every few days, so that by the third week it was half of each minute, and by the seventh week the riders were performing 15 solid minutes of active riding.At the end of the 7 weeks, the step-test was again given to both groups of subjects, and their pulses were taken. The post-exercise pulse rates of subjects in the experimental group were found to have decreased an average of 30 heart beats per minute, with the lowest decrease 28 and the highest decrease 46. The pulse rates of subjects in the control group remained the same or changed no more than 4 beats, with an average difference between the initial and final tests of zero.22.1 How many people were in each group?____A. 100. B. 50. C. 25. D. 15.
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