中国移动网络代维质量规范规定，光缆线路发生变更后应在（）天内提交更新资料。
A.7
B.10
C.5
D.3
参考答案：A
Some people _____ playing football while others enjoy _____ football matches. [ ]
A. are fond of; watching
B. are fond; watching
C. are fond of; watched
D. be fond of; watch
商品农药中，______等不用加水稀释。
A．低浓度的粉剂
B．颗粒剂
C．超低量喷雾的油剂
D．乳油
E．可湿性粉剂
