风湿痹痛兼有表证者,宜选用()。
A.秦艽
B.独活
C.威灵仙
D.桑枝
E.桑寄生
参考答案:B
The children are ______________ on the ground. [ ]
A. play
B. plays
C. playing
案例一
应采取怎样的措施来解决这一问题