升降机属（）设备。A、装载 B、运输 C、起重

患者，男性，45岁，髋关节脱位后，患肢不负重的时间是（）

A.3个月

B.2个月

C.1个月

D.0.5个月

E.1周

在CAD中绘制圆通常有（）种方式

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     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