b自然小调的正三和弦有：

A . 二 B . 三 C . 四 D . 五

A、<img src="http://p.ananas.chaoxing.com/star3/origin/3fe704bb2b8ab2b30b6c4a7b3601b327.png"> B、<img src="http://p.ananas.chaoxing.com/star3/origin/62fb740dc70750f9e1e7370d27b2ebab.png"> C、<img src="http://p.ananas.chaoxing.com/star3/origin/10b49d43cd9c84d283544ba261a13c77.png"> D、<img src="http://p.ananas.chaoxing.com/star3/origin/0fff1a145308ec0e7b17cb896e2a9aa9.png">

A、<img src="http://p.ananas.chaoxing.com/star3/origin/6460f4be419dcb18c2ff8bff283f45b7.png"> B、<img src="http://p.ananas.chaoxing.com/star3/origin/08e16e7536006a4f726424de09df4c1f.png"> C、<img src="http://p.ananas.chaoxing.com/star3/origin/309ec1ecb8c33a9eed7834664e8e9ad0.png"> D、<img src="http://p.ananas.chaoxing.com/star3/origin/be8eaa3218306ba91bb5eb25ab219799.png">

A、<img src="http://p.ananas.chaoxing.com/star3/origin/dad0f525ccf67ee4ff0b463537c9876b.png"> B、<img src="http://p.ananas.chaoxing.com/star3/origin/e20a4de98d95149b3bc54c292605e110.png"> C、<img src="http://p.ananas.chaoxing.com/star3/origin/3f0528579160e8d18846eeaee1617bb1.png"> D、<img src="http://p.ananas.chaoxing.com/star3/origin/210eb8358e656de94d96cdb553ae421d.png">

A、<img src="http://p.ananas.chaoxing.com/star3/origin/8be7e8c37f0187f0ea51ad77409cf813.png"> B、<img src="http://p.ananas.chaoxing.com/star3/origin/cc5ce8bd3a588992fd174a549eada5e5.png"> C、<img src="http://p.ananas.chaoxing.com/star3/origin/8942aa531d79402bcfa53aa64f2918b2.png"> D、<img src="http://p.ananas.chaoxing.com/star3/origin/38ada5e5e57140054d2b80cc86669c76.png">

A、Ⅰ B、Ⅳ C、Ⅴ

A．Y.是 B．N.否

A．I级 B．IV级 C．V级 D．V7

A．ⅱ B．ⅳ C．ⅲ D．ⅰ