动脉粥样硬化的发病机制中，哪些因子改变与本病有关（）。 A.LDL升高 B.ApoA

The World's Largest Insect

This giant insect can be used as a toy. A child ties one end of a string to a stick and the other end around the "neck" of an insect. Holding the stick, the child lets the insect go. With a loud whirring sound, the insect takes off, pulling the string in a large curve over the child's head. The child laughs as the stick jumps around. The child is African, and the toy is the African Goliath beetle, the largest insect in the world. 

The Goliath is a true insect because it has six legs and a body that is divided into three parts. Like all beetles, it has two pairs of wings. The front pair are thick and stiff and protect the back pair, which are soft. It is these soft back wings that make the beetle fly forward. They also cause the loud whirring sound the beetle makes when it flies. To steer, the beetle twists and turns its legs the same way you steer a bike by turning its front wheel. 

African children often use the Goliath beetle as a toy. Although it is over 15 centimeters long, it is quite harmless. 

小题1:The African Goliath beetle is _______.  

A．the world's largest insect

B．a toy used in many parts of the world

C．the only insect found in Africa

D．the world's smallest insect小题2:What made the whirring sound that the child heard?

A．The curved string.

B．The beetle's soft wings.

C．The beetle's six legs.

D．The beetle's body.小题3:We know the Goliath beetle is a true insect because it _______.  

A．makes a whirring sound when it flies

B．has both soft and hard wings

C．has six legs and a body with three parts

D．can fly小题4: When flying, the Goliath steers by_______.  

A．turning its soft back wings

B．twisting and turning its hard front wings

C．twisting and turning its legs

D．twisting and turning its whole body小题5: Where is the passage probably from ?

A．A story book .

B．A newspaper.

C．A student’s article

D．A science magazine .

间接成本的定义是什么？

关于慢性萎缩性胃炎的描述不正确的是（）。

A.可引起器泌素增高

B.可发生肠上皮化生

C.可合并胃溃疡

D.可引起胃酸增高

E.可引起恶性贫血

什么是关单关单的作用有哪些