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【单选题】
给出下列四个命题： ①有两条边和一个角对应相等的两个三角形全等； ②四边形的内角和等于它的外角和； ③各个角都相等的圆内接多边形是正多边形； ④正六边形既是轴对称图形，又是中心对称图形． 其中正确命题的个数是（ ）A.
1个
B.
2个
C.
3个
D.
4个
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举一反三
【简答题】Why did the boys put out the fire?
【单选题】why did the geologists put up a fire to burn the gas?
A.
Because the ground has fallen down.
B.
ln order to explore more
C.
The gas is useless
D.
To stop the poisonous gases mixing with natural air
【简答题】根据下图，回答 121～125 题。 第 121 题
【单选题】Why did the geologists put up a fire to burn the gas?
A.
Because the ground has fallen down .
B.
In order to explore more .
C.
The gas is useless .
D.
To stop the poisonous gases mixing with natural air.
【单选题】Why did Diego say that Ripley had won the prize before he got to the fire station?
A.
、He smelled Ripley's strong stink and heard his booming bark.
B.
、He and Maggie had already searched every business in town.
C.
、He knew that lost dogs were sometimes taken to the fire station.
D.
、He heard someone say the winner was smelly and drooled.
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