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【简答题】
Choose the best answer for each of the following multiple-choice questions. text C 1 A new school year means new opportunities(机会) for friendship, fun activities, and learning. It also means homework, studying, and projects. How can you fit everything in? First Things First 2 “The most important thing is that you spend the time of your life doing things that are important to you,” stresses P. J. Kennedy, director of counseling(咨询) services at the University of Wisconsin. Even though you don’t set the school’s hours, your dinner time, or sports practice, you still make choices about how you spend your time. And by the way, homework may not seem important to you now, but it is important for things you might want to do in the future! 3 “Make a to-do list for each day. Rank items, and focus on the most important things. Review(回顾,检查) your progress(进展) each night. 4 Write all activities in a calendar, and check it daily. Also look ahead(预先计划) at the next week or month. 5 Use your downtime(空闲时间) wisely. Work on a short homework assignment or review notes while waiting for a ride home from practice. 6 Multitask when it makes sense. Go for a bike ride with a friend, and you both get exercise and social time. 7 Set a timer(定时器) if you tend to lose track of(忘记) time. “TV and video games throw me off(让我把握不住) a lot,”admits(承认) Andrew L. of Holbrook,N.Y. “I don’t realize how much time I spend.” Problems with Procrastination 8 Don’t wait until the last minute. Break projects into pieces so they’re not overwhelming(难以抵抗的). “Smaller bites(一口的量) are easy to get started with,” says Alice Carrott, director of educational support services at the University of Kansas Medical Center. “And they’re easier to finish.”Make plans specific and realistic(现实可行的). For example, plan to read one chapter of an assigned book before noon on Saturday. Keep It Balanced 9 Don’t get so busy that you lose touch(失去联系) with friends. “Some people have everything going on every minute, and you can’t get together with them,” says Danielle, Andrew’s sister. “They run out of time to have fun.” 10 Cut back on(削减) activities when you need to. Sometimes that is the only way to keep up in school or free up time for new interests. 11 Don’t skimp(节省) on sleep or exercise. You’ll have more energy and be more efficient(效率高的) at whatever you do,says Carrott. Exercise relieves(缓解) stress too. 12 Talk with your family if you feel stressed. Or talk to a counselor. You’d ask a coach for sports tips. Why not for other areas too? Serious Study Tips 13 Pay attention in class, and ask questions. Homework and study time are easier when you understand the material. 14 Write down all assignments. Do homework in an order that makes sense to you. It also helps to arrange your study area so it’s comfortable and relaxing. 15 Work with your learning style(方式). “I make flash cards(教学抽认卡) so it’s easier for me to get it all in my mind,” says Ryan B. of Massapequa, N.Y. 16 Keep materials organized. “Whenever I get a piece of paper from a classor the computer, it goes right into a folder(文件夹),” says Danielle. “And it stays in there until I need it.” Feeling Stuck? 17 On days when you’re having trouble studying or finishing homework, try these strategies(策略). 18 If you feel antsy(坐立不安) while studying, let go of stress by squeezing a squishy(松软的) ball. 19 If random(任意的) thoughts distract(使...分散注意力) you, write them in a notebook. Then get back to work. 20 Feeling foggy(迷迷糊糊的)? Take a break. Grab a quick snack or talk with a friend or family member. But keep breaks brief so you can finish your work!
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【简答题】说明柴油的酸值和硫化物的危害?
【简答题】简述石油中硫化物的危害
【单选题】小儿营养不良最常见的病因是
A.
先天不足
B.
喂养不当
C.
缺乏锻炼
D.
疾病影响
E.
免疫缺陷
【单选题】小儿营养不良最常见的病因是
A.
饮食因素
B.
喂养不当
C.
缺少锻炼
D.
急性疾病
E.
免疫缺陷
【单选题】不属于剪切破坏的是
A.
铆钉连接
B.
键连接
C.
钢板用对接焊缝连接
D.
钢板用填角焊缝连接
【多选题】第四代头孢菌素的特点包括
A.
可用于对第三代头孢菌素耐药的革兰阴性杆菌引起的重症感染
B.
与第三代头孢菌素相比,增强了抗革兰阳性菌活性
C.
对β-内酰胺酶稳定
D.
无肾毒性
E.
可作为第三代头孢菌素替代药
【多选题】第四代头孢菌素的特点()
A.
可以对抗革兰阴性菌
B.
对β-内酰胺酶较为稳定
C.
有较强的肾毒性
D.
X寸革兰阳性菌的作用较第三代头孢菌素强
E.
不可作为第三代头孢菌素的替代药
【单选题】小儿营养不良最常见的病因是
A.
饮食因素
B.
日照不足
C.
缺少锻炼
D.
急性疾病
E.
免疫缺陷
【简答题】硫化物的危害主要有:()。
【多选题】第四代头孢菌素的特点
A.
对 G+菌有高效
B.
对 G-菌有高效
C.
对 β-内酰胺酶高度稳定
D.
对第三代头孢菌素耐药的细菌感染无效
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