题目

由于水的比热容比沙石或干泥土的比热容大，所以在沿海地区陆地表面的气温比海面的气温昼夜变化显著．因此（ ） A．白天的海风多是从陆地吹向海面，夜晚的海风多是从海面吹向陆地 B．白天的海风多是从海面吹向陆地，夜晚的海风多是从陆地吹向海面 C．白天和夜晚的海风多是从陆地吹向海面 D．白天和夜晚的海风多是从海面吹向陆地 10．如图是小李探究电路变化的实验电路，其中R1、R2为定值电阻，R0为滑动变阻器，Rmax为滑动变阻器的最大阻值          You don’t have to ask Barack Obama what it is like to be a president-elect．Chances are you can be one, too, and it won’t take more than 30 years’ efforts to achieve that．          A new computer game, Commander in Chief, offers the chance to step into the president’s shoes and see whether you can do a better job running the country than he can．          The video game will be available on January 20, the day Obama is sworn in （宣誓就职） as president．          So what will you do in the game?          Like Obama, your early task is to select members of the Cabinet（内阁）from 250 personality types．Then you immediately face internal（国内的）and external（对外的） challenges．Every decision you make has an in-game consequence．          “You can put your own political theories into action and see the domestic（国内的）and international effect,” said the lead designer Louis-Marie Rocques． Internal decisions involve managing budgets, security, education, health care and discussion over many proposed laws．You also have to respond to critics．Every decision has a consequence, which changes the political environment．For example, raising taxes will raise criticisms and protests while lowering taxes means you will have less money to play with．          What about external decisions? Well, you have to deal with military issues, global economics, trade agreements, and spending time lobbying（游说）other presidents．You can determine the course of world events by invading（侵略）a neutral country, or toppling（推翻）an unfriendly country but then you must face the economic, political, and military consequences．          Don’t want to be president of the US? The game also lets you become virtual（虚拟的）leader of other countries including France, Germany, Spain and Russia． 68．The purpose of writing this passage is mainly to     ．          A．show you how hard it is to be the newly-elected president, Barack Obama          B．explain why the video game is so popular among American citizens          C．introduce to you one special computer game, Commander in Chief          D．inform how designers developed the interesting computer game 69．Which of the following items belongs to internal affairs in the game?          A．Managing budgets, responding to critics and military issues．          B．Managing budgets, raising taxes and trade agreements．          C．Health care, discussing proposed laws and lowering taxes．          D．Education, security and lobbying other countries． 70．Which of the following is TRUE according to the passage?          A．Those who want to be a president one day will get a taste of their private life．          B．The first task in the game is to form the Cabinet consisting of 250 members．          C．The video game has hit the stores in America and enjoys sales success．          D．Like a real president, the players will face challenges at home and abroad