肉鸡于出售前_____天禁止使用抗生素,以防药物残留。
A.7
B.10
C.15
D.7~8
参考答案:C
After China launched a______to popularize Chinese, lots of Confucius colleges have appeared in foreign universities.(青岛市)
A.campaign
B.movement
C.measure
D.struggle