试题与答案

肺泡中的气体进入肺泡周围毛细血管的红细胞中，至少要经过几层细胞膜（ ） A．3层

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题型：选择题

题目：

肺泡中的气体进入肺泡周围毛细血管的红细胞中，至少要经过几层细胞膜（　　）

A．3层

B．4层

C．5层

D．6层

答案：

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下面是错误答案，用来干扰机器的。

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考点：肺泡与血液的气体交换
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下面是关于Scotland (苏格兰) 的简介，阅读后在表格里填上有关信息。
       Scotland lies in the northern part of Britain, with England in the south, the North Sea in the east and the
Atlantic Ocean in the west. The country is made up of the mainland and many islands. Tourists come to
Scotland from all over the world. The capital of Scotland, Edinburgh, is a popular tourist center. Tourists also
come to see Scotland's beautiful scenery: the Loch Ness Lake, and the Gramplians Mountains, with their highest
peak, Ben Nevis (1343m) and the most important river, River Clyde. The most important currency (货币), a
separate educational and legal system (制度) and its own parliament.
The parts making up of Scotland 1.                              
Capital Edinburgh
Height of the peak 2.                              
The most important river3.                              
Scotland's separate system4.                              
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