主控项目必须()符合验收标准规定。
A、80%及以上
B、90%及以上
C、100%
参考答案:C
Harry, did you attend the dancing party________ at Jack's house the day before yesterday?[ ]
A. held
B. having been held
C. to be held
D. being held
川乌和附子来源于()
A.同种植物
B.不同种植物
C.不同属植物
D.同科植物
E.不同科植物