齿轮传动的效率很高,一般在()之间。
A.85%~90%
B.94%~96%
C.98%~99%
D.99%~100%
参考答案:C
Tom, don't wear this kind of coat. It's ______ style. [ ]
A. in
B. out
C. of
D. out of
利用()组合键可以切换输入法的半角/全角状态。
A.Ctrl+Space
B.Ctrl+Shift
C.Shift+Space
D.Shift+Alt