皮皮学，免费搜题
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【单选题】
多饮水可以预防结石，其机制是（）
A.
缓解尿路梗阻
B.
使结石溶解
C.
起冲洗及稀释尿液的作用
D.
纠正尿液晶体与胶体的紊乱
E.
增加尿中晶体聚合抑制物质
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【单选题】如图，是在同一坐标系内作出的一次函数l 1 、l 2 的图象，设l 1 ：y=k 1 x+b 1 ，l 2 ：y=k 2 x+b 2 ，则方程组 y= k 1 x+ b 1 y= k 2 x+ b 2 的解是（　　）
A.
x=-2 y=2
B.
x=-2 y=3
C.
x=-3 y=3
D.
x=-3 y=4
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【单选题】如图，直线l 1 ：x=1，l 2 ：x=2，l 3 ：x=3，l 4 ：x=4，…，与函数y= 2 x （x＞0）的图象分别交于点A 1 、A 2 、A 3 、A 4 、…；与函数y= 5 x (x＞0) 的图象分别交于点B 1 、B 2 、B 3 、B 4 、…．如果四边形A 1 A 2 B 2 B 1 的面积记为S 1 ，四边形A 2 A 3 B 3 B 2 的面积记为S 2 ，四边形A 3...
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【单选题】The installments of new traffic signals on Devonshire Street has been only ______successful in lowering traffic congestion.
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【单选题】Peter Palumbo, chairman of the Arts Council, said the national companies were so successful commercially that when there was a shortfall in ______ there was little more they could do to raise money.
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【单选题】听力原文： Interview is extremely important if you want to apply for a job. To be successful in a job interview, you should demonstrate certain personal and professional qualifies to your potential bosses....
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【单选题】How to Be a Successful Businessperson Have you ever wondered why some people are successful in business and others are not? Here's astory about one successful businessperson. He started out washing di...
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【单选题】已知向量 a =（2，4，5）， b =（3，x，y）分别是直线l 1 、l 2 的方向向量，若l 1 ∥ l 2 ，则（　　）
A.
x=6，y=15
B.
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C.
x=3，y=15
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x=6，y= 15 2
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【单选题】如图，是在同一坐标系内作出的一次函数l 1 、l 2 的图象，设l 1 ：y=k 1 x+b 1 ，l 2 ：y=k 2 x+b 2 ，则方程组 y= k 1 x+ b 1 y= k 2 x+ b 2 的解是（　　）
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B.
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B.
specifically
C.
evenly
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【单选题】How to Be a Successful Businessperson Have you ever wondered why some people are successful in business and others are not? Here's astory about one successful businessperson. He started out washing di...
A.
sell cars
B.
own a restaurant
C.
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D.
be an airplane pilot
查看完整题目与答案
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A.
x=6，y=15
B.
x=3，y= 15 2
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x=3，y=15
D.
x=6，y= 15 2
查看完整题目与答案