—Mummy, could you buy me a dress like this?

—Certainly. We can buy ______ one than this, but________ this

A．a better, better than

B．a worse, as good as

C．a cheaper, as good as

D．a more expensive, not as good as

膝关节疾病与相关检查，下列错误的是（）

A.浮髌试验（+）：膝关节积液

B.前抽屉试验（+）：后交叉韧带断裂

C.后抽屉试验（+）：后交叉韧带断裂

D.麦氏（MCMurray）试验（+）：半月板损伤

E.髌骨摩擦试验（+）：髌骨软骨软化症