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【简答题】
抛物线y=x 2 +4x-3的对称轴是直线______．
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反馈参考答案：
举一反三
【判断题】The thing the author likes about the Internet is that he is able to communicate with people all over the world.
A.
正确
B.
错误
【简答题】植物组织培养按培养基的物理状态分为()培养基和()培养基
【简答题】What is the thing the author complains about? There is something wrong with ? .
【单选题】What is the thing that the author uses to describe grammar?
A.
the road map
B.
an excellent car
C.
tree and flowers
【判断题】To the author, the best thing that shows how a man is full of contradictions is the matter of sleep.()
A.
正确
B.
错误
【单选题】What is the thing that the author uses to describe vocabulary?
A.
the road map
B.
a well-conditioned car
C.
tree and flowers
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