低压保险丝（片）安装，应符合哪些规定？
参考答案：
（1）无弯折、压偏、伤痕等现象。
（2）严禁用线材代替保险丝（片）。
He _____ articles for our wall-newspaper these three years, and he _____ about forty articles.
A．has been writing； has written
B．has been writing； wrote
C．is writing； has been writing
D．has written； has written
中医辨证为：
A．肺胃热盛
B．风寒外袭
C．肺经风热
D．肝火上逆
E．脾胃湿热
