符合右心衰竭的临床表现是
A．夜间阵发性呼吸困难B．咳大量泡沫痰C．交替脉D．两肺湿啰音E．下肢水肿
参考答案：E
Sally has no time to visit her parents, but she makes telephone calls. She loves them so much.
A. hardly B. never C. often
大风天气时，空气中存在大量带电离子，罐车卸油时（）可能会与空气中带电离子摩擦产生电火花，引起爆炸。
A、水
B、核子
C、粒子
D、液体
