“是药三分毒”，几千年前中国人就已经认识到了中药的毒副作用。中医讲究辩证论治，强调因病、因症、因人的个性化治疗，如用清热解毒的中药，体内的热毒已清已解，就应该停止使用，否则就会出现毒副作用；如体内原本没有热毒，我们错用清热解毒的中药，同样也会产生毒副作用。中医的上述理念告诉我们应该（  ）

①承认矛盾的普遍性，不能讳疾忌医

②坚持具体问题具体分析，做到对症下药

③抓住事物主流，发挥药物对人体健康的决定性作用

④重视矛盾的次要方面，防止向不利方面转化

水在海洋、天空、陆地之间循环运动，永不停息。（ ）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
    Carole worried a lot about her weight(体重).She was a little too large,and she  1 that's all because she ate too much junk food.When Carole felt2 ， she loved to eat junk food to make herself feel better.Chocolates and cookies were her favorites.But when her stomach felt very full, she3wanted to eat.It was clear that she had no control over both food and bad feelings.Carole's parents were quite worried about Carole.They took4to see a doctor.The doctor didn' t think Carole was sick.He just told her some5 of developing better self-control(自制力).
    According to the doctor ,using6 for comfort (慰藉) is not always a bad thing.7if the first thing one wants to do is open his fridge(冰箱)whenever he is upset，it can be a problem.He asked Carole to try hard to8the habit of eating for comfort.He advised her to do9else to have fun，like talking to someone on the phone or going out with Mends when she felt unhappy.
    Carole felt the doctor's advice was really10.When she left.she was sure she would soon make a change!

有一条横截面积为S的铜导线，通过的电流为I。已知铜的密度为ρ，摩尔质量为M，阿伏伽德罗常数为N_A，电子的电荷量为e。若认为导线中每个铜原子贡献一个自由电子，则铜导线中自由电子定向移动的速率可表示为（  ）

去年，在第61届法兰克福国际书展上，集中展示了包括中国在内的各国人民创造的各种文明成果。如果让你写一篇 新闻报道，需要结合文化生活知识确定一组体现这一盛事的关键词，下列最准确的一组是：