题干

机械设计中有一个“等强原则”,即设计一个机械零件要使每一个部分强度相等,这样才不会因一个部分先报废而使其它完好的部分浪费。“等强原则”所蕴含的经济生活道理是   (   )

A:拥有先进科技,就能提高经济效益

B:必须合理配置资源

C:办事情要从整体着眼,寻求最优目标

D:市场经济是有效的资源配置方式

上一题 下一题 0.0难度 选择题 更新时间:2019-07-15 09:09:24

答案(点此获取答案解析)

B

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    There is no doubt that the first day of school can be crazy for most of students. New kids wander (徘) around in circles, waiting for the opening of the school door. The school nurse needs your medical records. ____ The freshmen are running in all directions, looking for their new classrooms.

    How can you overcome the first-day chaos? If you will go to a new school, try to arrange a visit before classes begin. Explore any areas, such as the playground, library, or school labs.____

    Get one and read it before your school, starts-then keep it in your school bag until you're familiar with your new surroundings. Your first day is also the time to bring in school supplies and books.

    You should arrange your schoolbag well the night before you go to school so that you won't look for what you need at the last minute.

    Did you try on eight different coats before deciding on what to wear?____ The best choice is to wear what makes you feel good, whether it is a new coat or an old sweater. If you plan to wear a pair of shoes, make sure they fit you well.

    ____ Some start with a gathering, while others may jump right into the first-period class. You'll meet your new teachers, and they will probably give you an overview of the courses, class rules, what the semester will be like, what supplies you'll need, and expectations of your performance and behavior. Some teachers will jump into their first lesson, while others may have some activities.____

A. Some schools even offer maps.

B. But you forget to bring it with you.

C. It all depends on the class and teacher.

D. Don't depend on your parents any more.

E. Each school has different opening-days.

F. You can also try to ask the teachers for help.

G. Lots of students have difficulty deciding on what to wear on the first day of school.