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【单选题】
武德四年的开元通宝，开元所代表的意思为：（）A.
开辟新纪元
B.
年号
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What does the author mean by saying 'we are encouraged to hop when we have two perfectly good legs' (Para. 4) ?
A.
We needn't hop because we are healthy.
B.
Only those who have something wrong in their legs can be encouraged to hop.
C.
It's foolish of us to hop when we have two perfectly good legs.
D.
We should use both sides of the brain.