由肠吸收的碘以T的形式存在于血液中，T从血液进入甲状腺上皮细胞

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问题单项选择题

由肠吸收的碘以T的形式存在于血液中，T从血液进入甲状腺上皮细胞内的转运方式是

A．单纯扩散

B．载体介导易化扩散

C．通道介导易化扩散

D．主动转运

E．胞吞

答案

参考答案：D

阅读理解

读短文做练习。

My family will go on a trip to Beijing. I invite my best friend Jenny. She lives in Ottawa. Ottawa is far from

Shijiazhuang. Jenny wants to come to Shijiazhuang by plane. She will stay with us for two days. Then we are

going to Beijing by train.

1. Who will go to Beijing?

A. My mother

B. My father

C. My family

2. Where does Jenny live? .

A. Beijing.

B. Shijiazhuang.

C. Ottawa.

3. How does Jenny go to Shijiazhuang?

A. By plane.

B. By train.

C. By bus.

4. How do we go to Beijing?

A. By plane.

B. By train.

C. By bus.

名词解释

词汇意义