It‘s well known ______ the earth moves round the sun.

问答题

It is a well-known fact that smoking can ﹍ cancer.

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单选题

Nowadays it is a well-known fact that second hand smoking does even more harm to human health.(2.0)

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多选题

It is known to all that a lot of South Korean ____ accepted plastic surgery.

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单选题

______is well known，data under-determines theories.

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单选题

wireless LAN,also widely known as WLAN or WIFI,is probably the most well-known member of the IEEE802 protocol family for home users today.It is standardized by （ ） and shares many properties with wired Ethernet.

答案解析