在美国近10年内莱姆病的发病率上升了26倍，年新发病达2万余例，_爱下问搜题

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问题单项选择题

在美国近10年内莱姆病的发病率上升了26倍，年新发病达2万余例，被称为“第二艾滋病”(the Second AIDS)，其含义是

A．为艾滋病的另一类型

B．其病原相似

C．其临床表现类似

D．在美国，其对人群健康的危害仅仅次于艾滋病

E．患病造成的经济损失与艾滋病相似

答案

参考答案：D

解析：说明莱姆病危害严重。

阅读理解

阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C 和D）中，选出最佳选项。

        Australia is an island and it is a continent. It is the largest island in the world but it is the smallest continent.
It is almost 7.7million sq. km. Compared with China, China is about 2 million sq. km. larger.
        Australia is in the south of the world. It lies between the Indian Ocean and the Pacific Ocean. The Indian
Ocean is to the west and the south. The Pacific Ocean is to the east.
        Most of the western half of Australia is highland. But it is not very high, and the land is rather flat (平坦).
High flat land is not called mountains. It is called Plateau. The west of Australia is called the Western-Australian
Plateau. It is about 300 m high.
        There is high land in the east of Australia, too. Some of it is plateau and some of it is mountains. The
highest mountain is in the southeast. It is called MT Kosciusko. It is 2228 m high. This high land in the east is
sometimes called the Great Dividing Range. It has this name because it divides the east coast from the rest of
the country. Between the Great Dividing Range and the western Australian Plateau the land is low. This part of
the country is called the Central Lowlands.
        The only big river in Australia is the River Murray. It begins in the mountains in the southeast of the
country and it runs westward into the Indian Ocean.

1. Australia is .

A. a big island
B. the largest one of the islands in the world
C. a small island
D. the largest one of the continents in the world

2. Most of the western half of Australia is .

A. very high
B. mountain
C. flat land
D. plateau

3. MT Kosciusko is .

A. in the southeast
B. in the west
C. in the east
D. plateau

单项选择题 B型题

逐渐开始和终止，又易复发的是（）。

A.心房扑动

B.三度房室传导阻滞

C.尖端扭转室速

D.阵发性室上性心动过速

E.窦性心动过速