支气管肺癌的发病与下列哪些因素有关（）
A.气候寒冷
B.长期吸烟
C.经常接触过敏物质
D.空气污染
E.慢性肺疾患
参考答案：B, D, E
—Can you give me a hand, Robin?
—But, Helen, you_____ my help every five minutes. I______ TV now.[ ]
A. need, am watching
B. need, watch
C. are needing, watch
D. are needing, am watching
影响行政效率的因素有（）、体制因素、人员因素、决策因素、法制因素。
