10.2 The existance of a crack results in locally intensified stresses which diminish with the decrease of distance
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10.3 Both brittle and ductile fractures are dependent on Temperature.
A. 对
B. 错
IB、IIB族元素中熔点和沸点最高的是()
A. 金
B. 铜
C. 镉
D. 汞
IB、IIB族元素中熔点和沸点最低的是()
A. 铜
B. 金
C. 锌
D. 汞
IB、IIB族元素中共价半径最大的是()
A. 金
B. 银
C. 锌
D. 镉