写出正确的答语。

1. Can a cow fly?

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2. What can fly?

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3. Can you jump?

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4. Can a mouse skip with a skipping rope?

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5. Can you ride a bicycle?

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6. Can a rabbit run?

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7. What can run?

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多形性腺瘤的间叶样组织来源于（）

A.间充质细胞

B.肌上皮细胞

C.黏液细胞

D.软骨细胞

E.平滑肌细胞