摩尔吸光系数愈大，表示该物质对某波长光的吸收能力愈强，比色测定的灵敏度就愈高。（）

下面文章中有5处（第61-65题）需要添加小标题。请从以下选项（A、B、C、D、E和F）中选出符合各段意思的小标题，并在答题纸上将相应选项的标号涂黑。选项中有一项是多余选项。

A. Enjoy the little things.

B. Get moving.

C. Be a social butterfly.

D. Don't get yourself down by stress.

E. Get your funny bone.

F. Keep a journal.

Secrets of People Who Never Get Sick

How do some friends survive every winter without even catching a cold? Some experts believe that they boost their immunity through simple lifestyle habits. Let’s steal their strategies and stay healthy all winter long.

小题1:. _________________

It’s long been known that friendship is good for your health. In fact, people with six or more types of relationships in their lives were 25% less likely to get sick than those with three or fewer. It’s possible that people with varies social networks have diverse perceptions of themselves—as a co-worker, friend or community member. That boosts self-esteem and makes it easier to avoid stress. As a result, these people tend to stay healthier. Steal this secret: Be open to meeting new people; go to new events and reestablish old friendship.

小题2: _________________

Research has found that moderate exercise can improve immune function and build up resistance to colds and infections. On study of 36 overweight women, conducted at Loma Linda University, in California, found that those who walked quickly for 45 minutes 5 days a week reported half the number of days with cold symptoms during a 15-week period as their sedentary(久坐的) counterparts. Steal the secret: Aim for 40 to 45 minutes of moderate exercise, such as brisk walking, cycling, swimming or light running, at least five days a week.

小题3:. _________________

Numerous studies have found that writing about a difficult or painful event not only accelerates the process of coping with it, but also can improve your physical health. When people write about upsetting or distressing experiences, it helps them judge the events more sensibly, understand them better and move on. Steal the secret: set aside twenty minutes a day for three successive days to write about the things that are most important to you now and how they’re affecting you.

小题4:. _________________

Even small pleasures—having friends over for dinner, playing with your kids in the backyard or going to a concert—can boost your immune system. In fact, according to research at the State University of New York, positive events have a better effect on immune function than negative events. Steal this secret: Make time for yourself. Start devoting at least half an hour a day to talking to a friend, reading a book or indulging in your favorite activity. Think of it as preventive medicine.

小题5:. __________________

Experts know that pressure increases the chance of catching the cold. The reason? Your body’s helper—T cells, which are key to defending against viruses, become weakened when you’re worn out. Steal the secret: Do some problem-solving. First, take a hard look at the situation and really consider whether you can do anything to change things. If you conclude that you can’t change that situation, try to change your physical and emotional reactions to it. Engaging in meditation, yoga or deep-breathing exercises and listing to calming music also help relieve stress.

阅读《月球探测的重大意义》，完成第1—4题。

       继阿波罗之后，18年中谁也没有探测过月球。上世纪90年代末，又兴起了新一轮的探月高潮，叫“重返月球”。现在美国、欧空局、俄罗斯、日本、乌克兰、奥地利、德国、巴西、印度和中国都提出了各自的探月计划。为什么月球探测突然又这么热闹起来了？月球不属于任何一个国家，谁先利用谁先受益，像公海一样，人家有能力到公海去打鱼，绝不会分给你中国一条。所以，月球是一个被剧烈争夺的地盘，军事上有非常重大的意义。

       21世纪对月球探测主要意义就是探索资源、能源。1994年，美国的克莱门汀号探测到月球上有水冰，1998年美国“月球勘探者号”探明了月球上钍、铀、钾、铁、钛等5种资源的全球分布。迄今为止，月球上已经探明的资源有十几种之多，而这些是对地球资源的重要补充和储备，将对人类社会的可持续发展产生深远影响。

       说到月球上的能源，主要有两种。一是太阳能。法国宣布，可以用微波的办法把月球上的太阳能输送到地球上来。如果在经度每隔120°处设一个发电站的话，那么，永远有一个站会被太阳照着，甚至两个站会被太阳照着，这样就可以向地球不间断输送能源。但是，毕竟利用太阳能是非常有限的，所以大家更关注的是第二种能源，即核聚变原料。谁都知道，太阳是连续的氢弹爆炸，产生巨大的能量。那么，能不能也像原子能发电一样，不让氢弹爆炸，而让它逐渐地、慢慢地释放出能量？这便是人类的“可控核聚变发电”的梦想。为此，人类已经研究五六十年了，也确实取得了巨大的成就，现在正在建设可控核聚变反应堆。但是，现在人类所用的原料是氢的同位素：氘（dāo）和氚（chuān）。氚是放射性的，另外，氚的反应结果要产生一个中子，很不好防护。假如用氦3代替氚，这个反应式是释放一个质子，这就比较好控制。另外，氦3是没有放射性的。月球上有多少氦3呢？大约有100万～500万吨的氦3。我们地球上有多少氦3呢？15万吨左右。我们中国全年现在要烧2亿吨石油，上千亿吨的煤，火车、轮船都不知道要用多少，巨大的投入啊！那么，用氦3替代呢？大约10吨左右。全世界的需求量是100多吨。所以，月球可以帮助地球提供至少上万年的可控核聚变原料，这对于缓解地球的能源危机无疑是一个好出路。

       另外，月球上有超高真空、没有磁场、地质构造稳定、高洁净、弱重力（只有地球的1/6）的环境。这样，在那里建立一系列的科学观测基地，可以对地球进行监测，也可以通过月球到达更遥远的空间，还可以生产各种昂贵的生物制品。因为，我们在地球上有几个问题是没有办法逃避的：巨大的重力、巨大的磁场、污染的环境，这些在月球上都可以规避。

       这个空间站可以被用来做很多很多事情，所以大家对月球产生了一种新的兴趣。

1．同样作为核聚变原料，和氚相比，氦3有哪几方面的优势？

     答：______________________________________________________________________

2．帮助编者回答一个问题：为什么月球探测突然又这么热闹起来了？

     答：______________________________________________________________________

3．作者是怎样对画线的内容进行说明的？

     答：______________________________________________________________________

4．对于新一轮的探月高潮，你想说些什么？

     答：______________________________________________________________________

什么是信访举报工作？

临床常用的超声探头频率约为 （ ）

A．2.5MHz

B．3.5 MHz

C．5.0 MHz

D．7.5 MHz

E．以上都对

胎膜