<img border="0"alt=""src="https://file.gaojiufeng.cn/questions/image/37/5850458_0.jpg"> <img border="0"alt=""src="https://file.gaojiufeng.cn/questions/image/37/5850458_0_1.jpg"> A．2.677k A，6.815kA B．2.132k A，3.838kA

A．2.677k A，6.815kA B．2.132k A，3.838kA

A．2.677k A，6.815kA B．2.132k A，3.838kA

A.2.631k
B.6.698kA
C.4.636k
D.7.786kA

正确答案A

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