Tips for cooking on a Tight Schedule

    From my experience, there are three main reasons why people don't cook more often: ability, money, and time.____

    Money is a topic I'll save for another day. So today I want to give you some wisdom about how to make the most of the

time you spent in the kitchen .Here are three tips for great cooking on a tight schedule :

    Think ahead .The moments when I think cooking is a pain are when I'm already hungry and there's nothing ready to eat. So think ahead of the coming week .When will you have time to cook? Do you have the right materials already?____

    Make your time worth it. When you do find time to cook a meal, make the most of it and save yourself time later on. Are you making one loaf of bread?____.It takes around the same amount of time to make more of something. So save yourself the effort for future meal.

    ____This may surprise you, but one of the best tools for making cooking worth your time is experimentation. It gives you the chance to hit upon new ideas and recipes that can work well with your appetite and schedule. The more you learn and the more you try, the more ability you have to take control of your food and your schedule.

    Hopefully that gives you a good start.____and don't let a busy schedule discourage you from making some great changes in the way you eat and live!

A. Try new things.

B. Ability is easily improved.

C. Make three or four instead.

D. Understand your food better.

E. Cooking is a burden for many people.

F. Let cooking and living simply be a joy rather than a burden.

G. A little time planning ahead can save a lot of work later on.

下列函数中，自变量的取值范围选取错误的是（  ）

${\left(2015-\pi \right)}^0+{\left(-\frac{1}{3}\right)}^{-2}$=____$$

如图所示，一个静止小球从A点沿粗糙程度相同的轨道下滑，经B点到达C点，从A点到达C点的过程中，小球的动能____，小球的重力势能____，小球的机械能____．（选填序号）①保持不变；②一直减小；③先增大后减小；④一直增大；⑤先减小后增大．