随着抗生素广泛应用，引起细菌性肺炎的病原体最主要的变化是（）

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问题单项选择题

A.肺炎球菌肺炎不断增加

B.革兰阴性杆菌肺炎不断增加

C.军团菌肺炎的发病率逐年下降

D.葡萄球菌肺炎很少发生

E.支原体肺炎很少发生

答案

参考答案：B

阅读理解

阅读短文，判断正(T)误(F)。

There are four seasons(季节)in a year. They're spring, summer, autumn and winter.

In spring it's warm. People(人们)often fly kites. And people often go swimming in summer, because

it's very hot. In autumn it's very cool, Many children like to play football. In winter it's very cold. The

children like to play with a snowman.

Which season do you like?

( ) 1. There are four seasons in a year.

( ) 2. People fly kites in summer.

( ) 3. Children don't like to play football in autumn.

( ) 4. In winter it's cool.

( ) 5. The children like to play with a snowman.

单项选择题 A1/A2型题

Angle错分类的优点是（）。

A.简明易懂

B.错畸形机制全

C.考虑了、颌、面、高度及宽度的不调

D.考虑了牙量、骨量不调问题

E.此分类法对正畸临床及科学研究有一定的指导意义