水平间隔分为（）
A、垂直间隔
B、横向间隔
C、纵向间隔
D、距离间隔
参考答案：B, C
ZD6-E型电动转辙机锁闭柱与锁闭杆缺口两侧的间隙为（）。
A、2mm±1mm
B、2mm±0.5mm
C、1.5mm±0.5mm
D、1.5mm±1mm
根据首字母补全单词或用所给词的适当形式填空.
1. What's your favorite s________? Science.
2. Look! The boy is p________ the piano.
3. The day before Thursday is W________.
4. Rick's family only ________ (have) one shower.
5. Please tell ________ ( I ) about yourself.
