某乡镇水厂使用二氧化氯发生器消毒,卫生部门在对饮用水中消毒剂常规指标进行检测时,应检测消毒剂指标是()。
A.余氯
B.总氯
C.二氧化氯
D.臭氧
参考答案:C
从方框内所给的选项中选择恰当的句子补全对话(其中有两项多余)。
A. What are you doing?
B. How about some apples?
C. What do you want?
D. Two, please.
E. Can I help you?
F. How much are they?
G. What about you?
Man: 1._____________
Girl: Yes, please.
Man: 2._____________
Girl: I want some oranges.
Man: Sorry. We don't have any oranges today. 3.______________
Girl: OK.
How many apples do you want?
Girl: 4._____________
Man: Here you are.
Girl: Thanks. 5.______________
Man: Four yuan.
Girl: Here is the money. Thank you.
Man: You're welcome.
视网膜母细胞瘤的首选检查方法是()
A.B超
B.CT
C.MRI
D.平片
E.眼底荧光摄影