如果凸轮轴刚度不足，工作时将发生弯曲变形，这会影晌配气定时。

将二次函数y=x²的图象向右平移1个单位，再向上平移2个单位后，所得图象的函数表达式是[ ]

A．y=（x﹣1）²+2

B．y=（x+1）²+2

C．y=（x﹣1）²﹣2

D．y=（x+1）²﹣2

色彩学上认为，（）色加在一起可以产生白色，而在颜料中三原色加在一起只能产生（）色。

润滑材料的种类？

In a traditionally drawn decision tree, a circle represents （）.

A．a chance to which no estimated monetary value can be assigned so that a likely pay-off can not be shown

B．a decision to which no estimated monetary value can be assigned so that a likely pay-off can not be shown

C．a chance to which an estimated monetary value may be assigned to calculate the most likely pay-off

D．a decision to which an estimated monetary value may be assigned to calculate the most likely pay-off

按照国家权力运作形态，国家可以分为（）。

A.人治国家

B.法治国家

C.民主国家

D.独裁国家