下列()不锈钢表现为无磁性或弱磁性
A. 1Cr13
B. 7Cr17
C. 1Cr18Ni9
D. 0Cr18Ni11Ti
GCr15表示铬的平均含量为1.5%的滚动轴承钢。
A. 对
B. 错
40Mn和40Cr其碳和合金元素的含量相同,其性能和用途相同。
A. 对
B. 错
A. Match the following words in Group A and B to make compound adjectives. Note that words from Group A should be the first half of the compound adjectives, and words from Group B should be the second half, then write down the Chinese meanings.