救治痢疾蜂群，可与摄氏（）度以上的晴天无风的中午在室外打开大盖、副盖，让蜜蜂排泄。
A6
B7
C8
D9
参考答案：C
When and where to build the factory ___ yet. [ ]
A. is not decided
B. are not decided
C. has not decided
D. have not decided
