逆缠在手掌上是什么表现?
参考答案:
手心由外向内翻转。
After graduating from college,I took some time off to go travelling,________ turned out to be a wise decision.(2010·四川,10)
A.that
B.which
C.when
D.where
对于()切削的刀具,磨料磨损是磨损的主要原因。
A.高速
B.中速
C.低速
D.中低速