问题
单项选择题
下列有关渗出液叙述正确的是()。
A.蛋白定性阳性
B.一般不凝固
C.相对密度<1.018
D.蛋白定性阴性
E.外观清晰或微混,常呈蛋黄色
答案
参考答案:A
下列有关渗出液叙述正确的是()。
A.蛋白定性阳性
B.一般不凝固
C.相对密度<1.018
D.蛋白定性阴性
E.外观清晰或微混,常呈蛋黄色
参考答案:A
We all need a healthy environment, but we produce waste every day and it does harm to our environment. Though we are young, we can still do something to help. In fact, even the simplest everyday activities can make a real difference to the environment. Here are some ideas for you to live a green life. Remember these three words: reduce, reuse and recycle. Reduce means “use less”. Don’t waste things. This saves money and reduces pollution and waste going into the environment. Before we buy something new, think if it is really necessary or maybe the old one will be just as good! When we do buy things, choose local products if possible, and try not to buy too many things from abroad. Reuse means “use again”. Use things for as long as possible. When we buy things, make sure that they last a long time. We should take care of them so that they will last, and we should repair them if we can instead of throwing them away and buying new ones. Don’t use a paper cup or a paper bag. It’s better to use a china cup and a lunch box because you can use them again. Recycle means “change things into something else”. Although it takes energy to change something into something else, it’s better than throwing things away or burning them. Find out what can be recycled in your neighbourhood and take part in recycling programmes. We should also buy products made from recycled materials, such as recycled paper, to help save trees. Title: 46 to Live a Green Life
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