与姜片虫病的发病机制有关的是（） A.姜片虫的吸盘造成被粘附黏膜机械性损伤 B.消耗

阅读理解。

     Many animals do strange  things  before    an earthquake(地  震).  This news may  be  important.

Earthquakes can kill people and knock down  homes. The animals may help to save lives.

     Some animals make a lot of noise before an earthquake. Farmers have told about this. Dogs  that

are usually quiet have started to howl(吠). Horses on farms have run around in circles. Mice have left

their holes and run away. Cows have given less milk.

     In a town in Italy, cats raced down the street in a group. That happened only a few hours  before

an earthquake. In San Francisco, a man kept tiny pet frogs. One Sunday, the frogs jumped   around

more than ever. They made loud noises, like bigger frogs. That night, an earthquake struck   the  city.

   People want to know when an earthquake is coming. Then they could get away safely. Right now,

there is no sure way to know ahead of time. Maybe the best way is to watch the animals.

1.This story is mostly about _________. 

A.how animals act before an earthquake

B.how an earthquake starts

C.how mice leaves their homes

D.when an earthquake begins

2.Before an earthquake, quiet dogs _________.

A. ran away

B. started to howl

C. climbed trees

D. race down streets

3. Before an earthquake, the frogs _________. 

A. sang

B. left their homes

C. jumped around a lot

D. become quiet

4.There have been earthquakes in _________.

A. most countries    

B. Italy and San Francisco

C. Chicago and Spain  

D. all the western countries

5.People want to _________.

A. be in earthquake        

B. find out early about an earthquake

C. run around in circles    

D. get away from earthquakes

关于多囊肾的描述正确的是（）。

A.是肾脏的一种先天性异常，有遗传性

B.为反复泌尿系感染引起

C.以血尿为主要表现

D.水肿为常见症状

E.多数囊肿与肾单位相通

1岁小儿，不会站立，表情呆板，很少哭，智力低下，尿有霉臭味，皮肤白皙，毛发黄褐色，腹反射亢进，三氯化铁试验(+)，该患儿的治疗主要给予

A．补充蛋白质

B．补充大量维生素

C．无特殊治疗方法

D．低苯丙氨酸饮食

E．补充多种氨基酸

“水中救险”是拓展训练营的一个项目，参赛选手用一张质量分布均匀的长方形床垫，其总体积为0.3m³．将床垫放入水中时，床垫有1/3体积浸没在水中．若被救者的平均质量为50kg，且要求被救者不得浸入水中．该床垫上一次最多能救起______个人．（g取10N/kg）

最易引起反射性心动过速的钙拮抗剂是：

A．拉西地平
B．尼莫地平
C．硝苯地平
D．氨氯地平
E．尼群地平