It could take 4-6 months before the first batch（批）of vaccines （疫苗）are available to fight A
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解决时间 2021-01-03 06:59
- 提问者网友：末路
- 2021-01-02 15:04
It could take 4-6 months before the first batch（批）of vaccines （疫苗）are available to fight A/H1N1 flu as swine flu, WHO officials said.
A. known
B. to know
C. knowing
D. having known
最佳答案
- 五星知识达人网友：患得患失的劫
- 2021-01-02 16:06
(答案→)A. knownB. to knowC. knowingD. having known解析：可联系答.案.网客服索取。
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- 1楼网友：撞了怀
- 2021-01-02 16:53
对的，就是这个意思
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