1-10KV架空电力线路保护区为导线边线向外侧水平延伸并垂直于地面所形成的两平行面内的区域,导线的边线延伸距离为()米。
A.4.5米
B.5.5米
C.5米
D.6米
参考答案:C
Although Rose is very busy, she still ____ a lot of time to her students in her spare time.
A.spends
B.provides
C.devotes
D.offers
麻醉的概念()
A.镇静
B.睡眠
C.无痛
D.肌松
E.整个或部分机体暂时失去感觉