信号工区进行设备巡视,发现尖轨底部缺油,应及时向车站反馈。
参考答案:对
Choose and fill in the blanks. 选词填空。
1. are you? I'rn 12 years old. (How tall, How old)
2. Kim walks to school. It's about 10 minutes (分钟). She lives the school. (near, far from)
3. Sandy is 1.35 metres tall. Danny is 1.44 metres tall. Sandy is . Danny is . (tall, short)
4. What are you wearing? I'm wearing . (a shirt and a pants, a blouse and a skirt)
能与硝酸汞溶液反应,但不能与盐酸反应的是 [ ]
A.Zn
B.Ag
C. Fe
D. Cu