问题 问答题

(10分)自然灾害与防治阅读材料,完成下列要求。经过长期的农业生产实践,我国各地不同农作物的播种、收获等的时间相对固定,否则会影响农作物的产全和质量。2013午4月,东北地区特续低温.大田春播时间普遍比常年推迟7~10天。分析4月份持续低温对东北地区农作物产量和质量的影响。

答案

参考答案:东北(农作物春播秋收,一年一熟,)适宜农作物生长的时间较短。(2分)春播推迟7—10天,即农作物生长期缩短了7—10天;(3分)错过适宜的播种期,扰乱了农作物正常的生长节律。(3分)所以,农作物的产量会减少,质量会降低。(2分)

阅读理解

阅读理解。

     Between school, homework, sports, your afterschool job, and hanging out with friends, it may feel

like there's no time for healthy eating. And when you do stop to eat, it's probably tempting to go the

quick and easy route by grabbing a burger and fries, potato chips, or candy.

     Even if you take time to eat three meals a day, you may still feel hungry at times.  This is natural-during

teens, a person's body demands more nutrients to grow. What's the answer? Healthy snacks. Snacking

on nutritious food can keep your energy level high and your mind alert without taking up a lot of your

time. Snacks are a great way to satisfy that hunger and get all the vitamins and nutrients your body

needs.

     But you need to pay attention to what you eat. Filling your face with a large order of fries after class

may give you a temporary help, but a snack high in fat and calories will only slow you down in the long

run.

     To keep energy levels going-and avoid weight gain-keep clear of foods with lots of simple

carbohydrates (sugars) like candy bars or soda. Look for foods that contain complex carbohydrates

like wholegrain breads and cereals and combine them with proteinrich snacks such as peanut butter or

lowfat yogurt (酸奶) or cheese.

     Choosing healthy snacks means shopping smart. Be careful of the health claims on food packages.

Just because something is "all natural" or "pure" doesn't necessarily mean that it's nutritious. For example, "all natural" juice drinks or sodas can be filled with sugar (which is, after all, a natural ingredient) but all

that sugar means they'll be high in calories and give you little nutrition.

     A granola (麦片) bar is a good example of a snack that people think is healthy. Although granola

bars can be a good source of certain vitamins and nutrients, many also contain a great deal of fat,

including a particularly harmful type of fat called trans fat (反式脂肪酸). Check the Nutrition Facts label

on the package to be sure.

1. People think that granola bar is healthy because ________.

A. it is a good source of calories                        

B. it provides trans fat

C. it contains some vitamins          

D. it is natural

2. In choosing healthy snacks, we should try to make sure that ________.

A. they are all natural or pure                          

B. they are high in nutrition

C. their packages are good                  

D. they contain harmless fat

3. Teens need snacks to ________.

A. keep a good figure            

B. gain weight

C. help grow                  

D. keep healthy

4. According to the passage, all the following snacks are good EXCEPT ________.

A peanut butter                        

B. fries

C. lowfat yogurt                        

D. wholegrain bread

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