题目内容

生产过程中( )是造成安全事故的最主要原因。

A. 人的不安全行为
B. 机械操作不当
C. 安全教育不够
D. 现场管理不严

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After learning valuable lessons about college life, here's a list I'd like to share of what I wish I had known before going to college:1. You're not going to miss home as much as you think you will. I was nervous and1 about living away from my parents and making new friends. In reality,2, that worry was3 and probably lasted just for a minute or two after my parents left campus. Then my new roommate and I went out together, and independence4 with the unknown suddenly felt like sweet, sweet freedom.2. Studying comes first. Sometimes it's hard to remember why you are really at college -- everything seems so fun -- but try to manage your time in a way that allows for some play after 5 are completed. If you think your first semester is a time for you to relax and you should be able to 6through the next four years, it'll show. You really don't want to spend time later recovering from the damage to your GPA in the first semester. So put some hours in at the library and do your best.3. Also related to my academic success is the7 of "place management." I can get more done in a library in 15 minutes than I can in my dorm in two hours. So when you study, don't do it in your dorm. When you can't focus your attention, a waste of your time is8 .4. If you're fairly self-assured when starting college, you have a strong idea of what you'd like to do with the rest of your life. Be yourself and don't let any failure 9 your confidence. Be sure to learn by 10 on your failures.

耐力素质中短时间耐力主要指( )

A. 持续时间45秒~2分钟的运动项目所要求的耐力
B. 持续时间20秒~1分钟的运动项目所要求的耐力
C. 持续时间120秒~180秒的运动项目所要求的耐力
D. 持续时间50秒~3分钟的运动项目所要求的耐力

有氧耐力是指机体在( )

A. 氧气供应比较充足的情况下,坚持短时间工作的能力
B. 氧气供应比较稀少的情况下,坚持长时间工作的能力
C. 无氧气供养的情况下,坚持长时间工作的能力
D. 氧气供应比较充足的情况下,坚持长时间工作的能力

耐力训练计划制订的第一步为( )

A. 选择运动类型
B. 明确运动目标
C. 确定运动强度
D. 确定运动时间

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