灭菌系统空气压力为()BAr。
参考答案:0.2
In relation to the Property Law of China:
(b) state the various measures that can be taken by a holder to protect the property if his property rights are infringed by others; (3 marks)
铜常被用来制造导线,这主要是因为它具有[ ]
A.良好的导电性
B.良好的导热性
C.金属光泽
D.较高的硬度