问题
选择题
下列对实验过程中出现的问题的处理方法不正确的是 [ ]
A．添加液体时，倒入的液体过多，可将多余的液体倒回原试剂瓶
B．实验中不慎打翻酒精灯，可用湿抹布盖灭
C．制作过滤器时，若过滤器的角度与漏斗的角度不吻合，可改变第二次对折的角度
D．用高锰酸钾制取氧气并用排水法收集后出现倒吸现象，可立即松开试管上的橡皮塞
答案
答案：A
搜题请搜索小程序“爱下问搜题”
下列对实验过程中出现的问题的处理方法不正确的是 [ ]
A．添加液体时，倒入的液体过多，可将多余的液体倒回原试剂瓶
B．实验中不慎打翻酒精灯，可用湿抹布盖灭
C．制作过滤器时，若过滤器的角度与漏斗的角度不吻合，可改变第二次对折的角度
D．用高锰酸钾制取氧气并用排水法收集后出现倒吸现象，可立即松开试管上的橡皮塞
答案：A
第四节 完形填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，从短文后各题的A、B、C、D四个选项中，选出适合填入 对应空白处的最佳选项。并在答题卡上将该选项涂黑。 David grew up poor. He started 26 in the 7th grade and by high school he was only going to school half days, leaving at 11 am to go to work. Lack of money meant lack of 27 opportunities, but he had a 28 for knowledge. In his 29 time he read books on human development, vocabulary builders, 30 that he thought would help him succeed 31 down the road. He was a hard worker and rose above his lack of higher education to produce decently for his family, 32 the factory life was taking it toll (造成伤害) on him 33 , emotionally, and spiritually. It was, in his mind, 34 him like a slow poison. In 1995 he bought his first computer and a few months later discovered the Internet. He wanted to be a part of it, and worked 48 or more hours in the 35 and worked 36 40 or more hours a week teaching 37 computer skills. He worked harder than he 38 had in his life, logging over 100 hours a week on many, many 39 . David began applying for jobs in the Internet and computer fields. He was shot down many times, but he never 40 . he had a goal and kept after it even when he didn’t feel like it because anything else seemed so 41 . That kind of drive and perseverance (坚持不懈) almost always pays off. I’m 42 to say David left the factory and took a job in the computer field. He beat out college-educated applicants with 4-year degrees with his 43 skills. This is a true story about 44 . It’s a story about believing yourself. It’s a story about finding what you love to do and following your 45 .
|