答案:各种材料的磁性有很大的不同
答案:各种材料的磁性有很大的不同
A. Good luck
B. Cheer up
C. Go ahead
D. No problem
A. already
B. yet
C. still
D. ever
A. appeared
B. happened
C. occurred
D. emerged
A. behaved
B. treated
C. dealt
D. acted
A. It is suitable for me.
B. No, it isn't.
C. You want to have one, too?
D. Thank you.