【单选题】急性胰腺炎病人禁食或胃肠减压的目的是 ( )
【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。 ( )
【多选题】长白山天池是( )三条大江的源头,也是中国、朝鲜的界湖。
【判断题】南浔在春秋战国时期有“吴根越角”和“越角人家”之称。
【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.
【单选题】建设( )是中华民族伟大复兴的基础工程,必须把教育事业放在优先位置。