（37秒到1分20秒）Now， part of the reason for this is thatwe'；ve invested a huge amount in nuclear deterrents.But we'；v-未来题库

（37秒到1分20秒）Now， part of the reason for this is thatwe'；ve invested a huge amount in nuclear deterrents.But we'；v

（37秒到1分20秒）Now， part of the reason for this is thatwe'；ve invested a huge amount in nuclear deterrents.But we'；ve actually invested very little（）.We'；re not ready for the next epidemic.

A.in a system to stop an epidemic

B.medical treatment

C.surveillance

D.in developing vaccines

正确答案：in a system to stop an epidemic

Tags:reason thatwe part