高等继续教育 / 欧美文化
正确率:100%
题型描述: 单选题
Edward Jenner discovered the vaccine for preventing
A.flu
B.smallpox
C.heartstrok
D.fever
Edward Jenner discovered the vaccine for preventing
A.flu
B.smallpox
C.heartstrok
D.fever
参考答案:
佳题速递: