The flu is believed---by viruses that.

学习时间:2026-06-04 22:47:42 阅读：2706

The flu is believed___by viruses that.causing being caused to have caused to be caused选哪个顺便解释下

碧蓝的豌豆

2026-06-04 22:47:42

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to be causedbe believed to 表示被认为是。。。由于flu和virus之间是被动关系,所以上一句要用被动语态正句话翻译过来就是流感被认为是由病毒引起的。。