问题 问答题 简答题

某处方如下:氯化钠8.6g,氯化钾0.3g.氯化钙0.33g,注射用水加至1000mL(已知氯化钾的1%冰点下降度为0.44)。求氯化钙的1%冰点下降度是多少?

答案

参考答案:

公式:χ1=(0.52-A)./0.58,已知:χ1=0.86=[0.52-(0.03×0.44+0.033×χ2)]/0.58,χ2=0.242℃,1%氯化钙冰点下降度是0.242℃。

完形填空

Fruit and vegetables should be a part of what we eat every day. Educating your children about the importance of eating fruit and vegetables is important for their health. Here are some fun activities to help you teach your children about fruit and vegetables.

★ Reading is one excellent way. Choose a colorful book with many different types of fruit and vegetables.

★ Provide your children with fruit and vegetable puzzles. Your children will be able to see what fruit and vegetables look like as they’re putting the puzzles together. You can also teach them the different names of fruit and vegetables.

★ Each day give your children different fruit and vegetables to eat. This will give them the chance to taste many kinds of fruit and vegetables. Talk to your children about what they look like and how they taste and smell.

★ Play fruit and vegetable games. Prepare little cups with fruit and vegetables cut up into small pieces. Cover your children’s eyes and give them one of the cups to try. After tasting, they have to guess what kind of vegetable or fruit it is.

★ Grow vegetables. You can teach your children how vegetables grow by planting them. Your children will also learn how to take care of vegetables.

Judge the following sentences true ( T ) or false ( F ) according to the passage.

小题1: Reading is a good way to help your children know about fruit and vegetables.

小题2:The puzzles can help children know how fruit and vegetables taste and smell.

小题3: By playing fruit and vegetable games, children can know what fruit and vegetables look like.

小题4: Growing vegetables can teach your children how to look after vegetables.

小题5: The passage is mainly about the advantages of eating fruit and vegetables.

单项选择题