原式=23-(3-43+4)+4
=23-3+43-4+4
=63-3.
If you get_______ in a foreign city, you’d better stay where you are and wait for your friends
A.lose
B.to lose
C.losing
D.lost
笔记本电脑最早采用的是()电池。
A、锂
B、镍氢
C、镍镉
D、以上同时出现