数控机床的自动换刀装置中,实现之间传递和装卸刀具的装置称为()。
参考答案:刀具交换装置
下列说法正确的是( )
A.相同温度下,饱和溶液一定比不饱和溶液浓
B.饱和溶液一定是浓溶液
C.不饱和溶液降温不一定会变成饱和溶液
D.对于同一种物质来讲,饱和溶液一定比不饱和溶液浓
An analyst does research about convexity. The best measure of convexity for a putable bond is:()
A. Modified convexity.
B. Macaulay convexity.
C. Effective convexity.