支气管肺炎区别于支气管炎的主要特点是（）。
A.发热
B.咳嗽程度
C.有无呼吸困难
D.肺部有无固定的细小湿啰音
E.青紫
参考答案：D
— Is this your jacket?
— No, it isn't. _____ jacket is blue,but this one is red.
[ ]
A. Your
B. Her
C. His
D. My
—You seem to have had that car for years.
—Yes, I should sell it ________ it breaks down.[ ]
A. while
B. after
C. until
D. before
