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【单选题】
经过直线x+3y+7=0和3x-2y-12=0的交点,圆心为(-1,1)的圆的方程是( )A.
+ =25
B.
C.
+ =5
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【简答题】Commercialization has permeated throughout our life and has turned what was traditionally an interest free relationship into seller-and-buyer or consumer-and-service relationship in many fields includ...
【简答题】完型填空。 Water costs money. In some places water is hard 1 . What 2 when a town has these problems? A small town in California found a happy answer. Very 3 rain ever fell there. The town had no water 4 ....
【简答题】The most suitable site for a radio transmitter (发射台) is an isolated place far from cities. (best located) A radio transmitter __________ at an isolated place far from cities.
【简答题】Water costs money．In some places water is hard 16 ．What 17 when a town has these problems？A small town in California found a happy 18 ． Very 19 rain fell there．The town had no water of its 20 ．The w...
【多选题】{What are the problems with this chart? }
A.
People are the least skilled at judging angles
B.
By making the pie chart 3D and slightly tilted, the angles are difficult to judge
C.
There are too many slices to the pie
D.
This chart has no problems
【判断题】An independent paragraph is an isolated one which has its own separated existence and it is like a complete essay by itself.
A.
正确
B.
错误
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