和大伙讨论一下这道JJ?在就目前所有的信息,我觉得选A,因为“serveS”的原因。听听大伙的
Medical breakthroughs born (in war serves 后面是例子,如包扎什么的, emerged) from
in war serves一个动词单数形式, emerged
in war serve 一个动词的复数形式, come out
of war serve 一个动词的单数形式
of a war
结果忘了是选的哪个了,不过需要掌握这几个点。
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