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【简答题】
Direction: Read the article "Is Christmas Celebrated in China" carefully, and then give proper definition to the red words in the article. Pay attention to speech of the words. (注明单词的词性) variety
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【简答题】水样的保存方法有哪些?对测定酚的水样,应采用什么保存方法,其作用是什么?
【简答题】20世纪中国第一次历史性巨变是。 （ ）
【单选题】Which of the following statements is NOT true according to the passage?
A.
When snow is melting, the amount of runoff will become more.
B.
Many rivers are flooded periodically.
C.
Flash flood is usually caused by earthquakes.
D.
Floods also destroy the spawning grounds for fish.