小儿易发生溢奶和呕吐的原因包括（） A.幽门括约肌发育良好 B.

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小儿易发生溢奶和呕吐的原因包括（）

A.幽门括约肌发育良好

B.幽门括约肌发育不成熟

C.婴儿胃呈水平位

D.贲门括约肌发育不成熟

E.吸奶时常吞咽过多空气

答案

参考答案：A, C, D, E

阅读理解

阅读理解。

My name is Deng Ming. This is my village. It is in the mountains. There are many small houses and a

river. There is a bridge over the river. There are many fish in the river. There is a road beside the river. There

are many flowers near the road. There is green grass and many trees. We can run on the grass. There is a lake

near my village. The water is clean. It's a beautiful village.

1. There is a over the river.

2. There are many in the river.

3. There are many near the road.

4. There is a near the village.

5. We can run on the .

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