铁路全部车辆按其用途可分为（）
A、客车和货车
B、客车、货车和特种用途车
C、客车、货车和企业自备车
参考答案：A
根据首字母提示补全单词。
1. — Welcome to China.
— T___________ you.
2. A: How are you?
B: F___________, thanks. And you?
A: I'm OK.
3. Lily: Mom, this is my t___________, Miss Gao.
Miss Gao: Nice to meet you.
Mom: Nice to meet you, too.
4. — S___________ you later.
— See you.
5. — Goodbye.
— B___________.
任何情况下物体受到的支持力一定等于重力______（填“正确”或“错误”）．
