适宜的点火火焰颜色是（）。

单词拼写

     根据下列各句句意和空白之后的汉语提示词,在横线上写出对应单词的正确形式,每空

只写一词。

1. __________ (天文学)is scientific study of the sun, moon, stars, planets, etc.

2. A week ago, father bought a Christmas tree ________ (装饰)with coloured lights.

3. Some books are to be tasted, others to be swallowed, and some few to be _______  (咀嚼)

    and digested.

4. A great celebration was held on his _________(50岁)birthday.

5. The news he __________ (传播) around the town was not true.

6. In fact, China is a_________(多山的)country.

7. At that time in the southern states, blacks were not treated as equal ________(公民) in the USA.

8. Though golf has more than 100 years of history in South Korea, it was only in the 1990s that it

     became popular __________ (全国范围).    

9. The man is carrying a heavy bag, __________ (重量达..) about thirty kilos.

10. Mike's family used to live in a __________(欧洲的) country.

在复杂的体系中，确认化学反应先后顺序有利于解决问题，下列化学反应先后顺序判断正确的是（　　）

A．在含等物质的量的AlO₂^-、OH^-、CO₃^2-的溶液中，逐滴加入盐酸：AlO₂^-、OH^-、CO₃^2-

B．在含等物质的量的FeBr₂、Fel₂的溶液中，缓慢通入氯气：I^-、Br^-、Fe²⁺

C．在含等物质的量的Ba（OH）₂、KOH的溶液中，缓慢通入CO₂：KOH、Ba（OH）₂、K₂CO₃、BaCO₃

D．在含等物质的量的Fe³⁺、Cu²⁺、H⁺的溶液中加入锌粉：Fe³⁺、Cu²⁺、H⁺、Fe²⁺

确诊霍乱最可靠的依据是（）。

A.粪便培养霍乱弧菌阳性

B.粪便涂片镜检阳性

C.严重腹泻

D.明显脱水

E.流行病学资料

白头翁汤的主治证是

A．脾约

B．胸痹

C．热痢

D．结胸

E．蓄血

集水系统主要有哪些类型？微区域集水系统（mawh）的结构和功能有什么特点？