未知题型
When the key is pressed, the 7-segment digital tube displays ’P’, and the LED is turned on. When the key is released, the 7-segment digital tube displays ’-’, and the LED is turned off. The key is connected to P3.2, as an interrupt 0 input.
A.2, 解析：根据题目描述，当按键被按下时，7段数码管显示字母"P"，LED灯亮起；当按键被释放时，7段数码管显示"......
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单项选择题 氯气被液化是一个（）过程
未知题型 拔插头时，请勿直接拉电线，应拔插头，注意手部保持干爽（）
未知题型 The height of 40HQ is 8 feet 6 inches tall.
