高炉冷却系统定期清洗的目的是清除水垢。（）
参考答案：对
读句子，根据图片回答问题。
A. B. C.
1. A: It's 2:00 in Beijing. What time is it in New York?
B: It's o'clock.
2. A: It's 2:00 in Beijing. What time is it in London?
3. A: It's 2:00 in Beijing. What time is it in Sydney?
秦艽具有的功效是（）
A.止痹痛，治骨鲠
B.通经络，利水
C.止痹痛，解表
D.通络止痛，退虚热，清湿热
E.止痹痛，安胎
B.
C.