有关股骨颈骨折的特点错误的是:()
A.老年人常见
B.股骨头供血不良
C.股骨头下骨折血运可减少30%
D.易导致缺血性骨坏死
E.可出现多种并发症
参考答案:C
—We can use QQ to talk with each other on the Internet.
—Really? Hut can you tell me ______ use it? [ ]
A. how I can
B. how can I
C. what I can
电潜泵保护器的作用主要是提高电机中的压力。