每次起动胶带输送机前，必须先发出信号，通知人员离开带式输送机转动部位，然后点动1次，再正式运行。
参考答案：错
—What do you do at the weekend, Jim?
—I prefer ______ to ______. [ ]
A. playing computer games; going out
B. playing computer games; go out
C. to play computer games; going out
D. play computer games; go out
患者男性，34岁，发热，咳嗽，咳砖红色胶冻样痰，该患者可能是
A．二尖瓣狭窄
B．大叶性肺炎
C．克雷伯杆菌肺炎
D．支原体肺炎
E．肺梗死
