题目

将气体A，B置于容积为2L的密闭容器中，发生反应：4A（g）+B（g）=2C（g）反应进行到4s末，测得C为0.2mol．则该反应速率v（C）为（   ） A . 0.025 mol/（L•s） B . 0.012 5 mol/（L•s） C . 0.05 mol/（L•s） D . 0.1 mol/（L•s） 答案：A A ship had an accident on the sea. The only survivor (幸存者) was washed up on a small lonely island. ________ lived on the island.Several days passed, but no one came to save him. However, he didn’t give up. Every day, he watched the sea to see ________ any ship could pass by and find him. But things always made him ________.He managed to ________ a little hut (小屋) with some wood to protect himself from bad weather and some animals. But then one day, after looking for food, he arrived home only to find his little hut on fire. The heavy ________ rose up to the sky.He thought the ________ thing had happened and that everything was lost. He was very sad and angry. “God, it’s unfair. ________ could you do this to me!” he cried loudly. He even didn’t have the courage to live.Early the next morning, however, he was ________ by the sound of a ship that was coming to the island. It was coming to save him. “How do you know I am here?” asked the lucky man. “We saw your smoke signal.” they replied.In our life, it’s easy to lose courage when things are going bad, but we shouldn’t lose ________. Remember, after a ________ comes a calm.【1】A.SomebodyB.NobodyC.Anybody【2】A.ifB.unlessC.or【3】A.scaredB.excitedC.disappointed【4】A.buildB.discoverC.get【5】A.airB.smokeC.light【6】A.worstB.hardestC.easiest【7】A.WhenB.WhatC.How【8】A.beatenB.wokenC.heard【9】A.heartB.wayC.face【10】A.cloudB.stormC.trip