公民进行政治参与的最重要、最直接、最广泛的政治权利是( ) A．政治选举 B．政

阅读理解。

     Baseball is one of the most popular sports in the USA. Children play baseball in sports fields or

inparks.At summer picnics,there is often an informal (非正式的) baseball game. Boys and girls, the

youngand the old  take  turns to bat (周球棒击球). Each team has nine players.

     The baseball season goes from April to September. During this time, baseball matches are shown

on TV and members of the important baseball teams become America's heroes. At the end of the

seasons, the two top teams play against each other.

     Many baseball fans go along to watch the game.Millions of others listen to the radio or watch TV.

People seem to talk only about the result and the players.

     American football is the most popular sport in the USA, The football season begins when the

baseball season ends. More people are interested in football than baseball. When there is an important

game, thousands of people sit beside the radios or in frontof the TV sets to get the result.

1. Where do children play baseball in America?

     _______________________________________

2. How many players does each baseball team have?

    _______________________________________

3. When does the baseball season go?

    _______________________________________

4. What is the most popular sport in the USA?

    _______________________________________ 

被称为“地球之肺”的资源是（  ）

A．丰富的水能

B．充足的太阳能

C．热带草原

D．热带雨林

旨在为其会员争取更好的工作条件和更高工资的组织是______

A．商会
B．工会
C．政府
D．金融机构

患儿，2岁，家长发现患儿瞳孔区呈现“猫眼样反光”，视网膜检查见圆形或椭圆形边界不清的黄白色隆起的肿块，肿块摘除术后活检。

该疾病属于哪种起源的疾病()

A．上皮组织源性

B．间叶组织源性

C．神经外胚叶源性

D．多胚层源性

E．以上都不是

促使斑块破裂出血及血栓形成而致心肌梗死的诱因有（）

A.在饱餐特别是进食多量脂肪后，血脂增高，血黏稠度增高

B.先天性畸形

C.晨起6小时至12小时交感神经活动增加，机体应激反应性增强，心肌收缩力、心率、血压增高和冠状动脉张力增高

D.休克、脱水、出血、外科手术或严重心律失常，致心排出量骤降，冠状动脉灌流量锐减

E.重体力活动，情绪过分激动，血压剧升或用力大便时，致左心室负荷明显加重