题目内容
TTL与非门电路不用的输入端可以悬空,悬空时,相当于逻辑“1”电平。
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CMOS 门电路与 TTL相比，其突出优点为：微功耗、抗干扰能力强。
CMOS电路主要元件是三极管。
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Task 4Directions: The following is a list of terms related to travelling abroad. After reading it, you are required to find the items equivalent to those given in Chinese in the table below. Then you should mark the corresponding letters in order of the numbered blanks, 53 through 57, on the Answer Sheet.
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