一次性导尿管留置时间:我有个关于英语的问题要问

来源:百度文库 编辑:杭州交通信息网 时间:2024/05/21 13:51:14
As is know, smoking is harmful to one's health.有哪位高手能告诉我这句英语有问题吗?如果有的话能帮我改一下吗?最好在告诉我为什么?

应改为As is known,不是know

As we know or As is known

As is know ------"As we know,"

know------knowen