下列哪项是藻类、苔藓、蕨类植物所具有的共同特征（　　）

作者从反面论证“人和”的重要性的一组排比句是？

历史概念是反映历史研究对象本质属性的思维形式。以下对一些历史概念的解读正确的是（）

    Here are some tips about how to keep healthy.

1) Healthy food is important. If you want to keep healthy, eat lots of fruit and vegetables. Don't eat much meat.

2) Water is important. Drink water every day. Milk is good for you, too. Don't drink sweet drinks.

3) Exercise is important. You can ride your bike or play soccer. Going swimming is a good idea.

4) Clean air is important. If you are free, you can go to the park and enjoy clean air.

5) Your teeth are important. You should brush your teeth twice a day.

6) Sleep is important, too. Go to bed early. Don't stay up late, or you will feel sleepy.

近年来，全国人大及其常委会审议通过了劳动合同法、防震减灾法、残疾人保障法、侵权责任法等一系列保障民生的法律，它对生命权、健康权、继承权等一系列公民的人身、财产权利进行了全方面、多层次、立体化保护。一系列法律的制定和实施，为公民享有权利提供了（   ）