肺癌好发于
A．经抗痨治疗无好转B．咳嗽、咯血、胸痛、发热、消瘦等C．经抗痨治疗有效D．青壮年E．40岁以上的中老年男性
参考答案：E
It’s ten thirty in the evening. It’s time __________.[ ]
A. go bed
B. go to bed
C. to go bed
D. to go to bed
燃料的低位发热量
