题干

中国﹣094核潜艇上的核反应堆内使用了液体钠铝合金(单质钠和单质铝熔合而成,可看作二者的混合物)做载热介质,有关说法不正确的是(   )

A:铝钠合金投入到足量氯化铜溶液中,肯定有氢氧化铜沉淀也可能有铜析出

B:铝钠合金若投入一定的水中可得无色溶液,则n(Al)≤n(Na)

C:mg钠铝合金投入足量水中,若所得溶液只含一种溶质,则其中含有钠的质量为0.46mg

D:若mg不同组成的铝钠合金投入足量盐酸中,若放出的H2越多,则钠的质量分数越大

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D

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选择合适的选项完成短文。

    The key to losing weight is to understand what really motivates you. have you ever been excited about losing a few pounds?____ And to help you keep your weight under control, you need some coping strategies.

    Ask questions. When you're researching different dieting products and plans or even talking to a doctor about diets, ask as many questions as you can.____Ask questions like: Do I have to purchase special meals or supplements? Does the program include a part to help me maintain my weight loss?

    Get real.____Don't burden yourself with unrealistic expectations. Remember, large amounts of weight loss are not realistic and are most likely not safe or healthy. Talk with your health care professional to determine a healthy weight goal.

    ____To maintain your weight, you must balance your intake of calories with the energy you burn. Just 30 minutes of fast walking in most days can take about 10 pounds off your weight each year.

    Weight yourself weekly. It's important to track your weight on any diet or weight loss plan, but don't get on the scale every day. weighing daily won't show you the big picture.____

A. Stay balanced.

B. Once a week is fine.

C. Stick with your healthy eating plan.

D. Losing one to two pounds a week is a realistic goal.

E. Being well informed will help you choose the best diet for you.

F. Regular weight check-ins will show you your progress over time.

G. If so, you must find a way to turn that excitement into determination.