既是我国地势第二级与第三级阶梯的分界，又是省级行政单位分界线

【名词&注释】

水资源(water resources)、大兴安岭、公共场所(public places)、节约用水(water saving)、乡村音乐(countryand wes-tern music)、第二级(second order)、不间断(nonbreak)、分界线(separatrix)、省级行政单位、第三级(third stage)

[单选题]既是我国地势第二级与第三级^{(third stage)}阶梯的分界，又是省级行政单位分界线^(separatrix)的山脉是：

A. 大兴安岭
B. 阴山
C. 太行山
D. 昆仑山

查看答案&解析查看所有试题

学习资料：

[单选题]（4）地球上的总储水量虽然很大，但淡水很少，爱护水资源是每个公民的责任和义务。下列行为属于节约用水的是__39_______(填序号)

A. 公共场所不用随手关水龙头
B. 洗完菜的水用来浇花
C. 不间断^(nonbreak)放水刷牙

[单选题]Country music is very old． It came from the United States，Canada，Ireland and Great Brit-ain． It is a mixture of (11) from all of these places．In the west of America，cowboys had to take care of the cattle． They had to watch them all clay and all night because the cattle were nervous and (12) ran away． A cowboy's life was (13) and dangerous． When he was alone in the desert with the cattle，he drank strong coffee to(14) awake(清醒的) at night: He also sang songs to the cattle to make them quiet． He sang about the stars and the moon．about his family and his friends．The cattle (15) the cow-boy and went to sleep． They would not run away (16) he sang beautiful and peaceful songs．

A. many people came from Ireland，Scotland and England． Other peo-ple came from France and Canada． They enjoyed their own kind of music． They used guitars，vi-olins and other musical instruments (器具 )， too．They also added instruments from their homes．(17)bottles and plates．When they (18) ．their friends and families on holidays．They usually sang and played country music．
B. It talks a-bout friends and enemies，trucks and highways，farms and crops． People in many parts of the world like country music because everyone knows (20) ．about these ideas． Also，many country music fans wear Western clothes-and dance together to country music. Many bands(乐队 ) all over the world now perform. country music．
D. music
E. view
F. sport'
G. exercise

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