[单选题]It is well known that good lubrication will () the bearings from becoming overheated.A . presentB . preventC . avoidD . provide
[单选题]Passage OneOne of the well-known of American writers is Samuel Clemens, whose pen name is Mark Twain. Bom in 1835, Twain grew up in the Mississippi River town of Hannibal, Missouri. As did many other boys of his day,Twain dreamed of traveling on rive
[问答题]It is well known that coal is an important source of energy.
[单选题]It was well known that Thomas Edison ____________ theelectric lamp.A.discov
[单选题]It was well known that Thomas Edison _____ the electric lamp.A.discoveredB.
[单选题]It was well known that Thomas Edison _____ the electric lamp.A.discoveredB.
[单选题]It was well known that Thomas Edison __________the electric lamp.A.discover
[问答题]()A dog is always well-known as a clever and friendlyanimal.
[问答题]A dog is always well-known as a clever and friendly animal.
[问答题]A dog is always well-known as a clever and friendly animal.