影响骨折愈合的最主要因素是()。
A.年龄过大
B.未服接骨片
C.曾中风
D.骨折端血供不足
E.固定时间过久
参考答案:D
Studies show that people are more ________ to suffer from back problems if they always sit
before computer screens for many hours. [ ]
A. possible
B. supposed
C. sure
D. likely
板带轧机以()来命名。
A、工作辊辊身长度
B、支持辊辊身长度
C、钢卷外径
D、钢卷内径