阻塞性肺气肿患者，不会表现为（） A.心音减弱 B.X线胸片上气管分叉展开 C.X线

（8分）已知X、Y、Z、W四种元素分别是元素周期表中三个短周期的元素，且原子序数依次增大。X、W同主族，Y、Z为同周期的相邻元素。W原子的质子数等于Y、Z原子最外层电子数之和。Y的氢化物分子中有3个共价键。Z原子最外层电子数是次外层电子数的3倍，试推断：

（1）X、Z二种元素的元素符号：X_________、Z__________。

(2)由以上元素中两两形成的化合物中：溶于水显碱性的气态氢化物的结构式为：          ，它的共价键属于         （填：极性、非极性）键；含有离子键和非极性共价键的化合物的电子式为           。

(3)由X、Y、Z所形成的常见离子化合物是___________，该化合物与W的最高价氧化物的水化物的浓溶液加热时反应的离子方程式为：___________________；

X与W形成的化合物与水反应时，水是         （填：氧化剂、还原剂）。

Mother’s Day is usually celebrated on the second Sunday of May every year. Do you know that a mom deserves a special gift this year for Mother’s Day? Sure, flowers can always brighten Mother’s Day and a dinner out is always appreciated. However, doesn’t she deserve something more personal or something that lasts longer than an evening?

I’m talking about the gift of fitness. Improved fitness is a gift that is invaluable to everyone. When you give a woman the gift of fitness, you are helping her open her door to better health. I can’t think of a more thoughtful gift that shows the recipient （接受者）how much you care about their well-being. By giving the gift of fitness you are providing them with unlimited health benefits. Besides, it’s a gift that you can truly feel proud to give.

Of course, we all know that exercising can help people stay slim and fit. But, do you also know about all the other great benefits of exercising? Daily physical activities reduce stress and help you sleep better. Fitness has been linked to reducing the risk of some diseases and to warding off depression. Researchers also believe that strength training can help prevent osteoporosis （骨质疏松）. Not to mention that exercising also improves self-esteem, increases energy and helps you be able to do continuous work for longer.

All moms would find these benefits extremely great. If they are like most of us, they have probably even mentioned how they would like to drop a few pounds or just get in better shape. In fact, experts say that about 62% of Americans are currently on a diet. By giving the gift of fitness, you are helping provide your mom with extra motivation. She may be more motivated to actually get fit because she doesn’t want to feel guilty about ignoring such a thoughtful gift.

小题1: The first paragraph is likely to tell us that ________.

A．we should give a special gift to our mom for Mother’s Day

B．we should invite our mom to a dinner for Mother’s Day

C．it’s good to send flowers to moms for Mother’s Day

D．moms aren’t worth special gifts for Mother’s Day小题2: The underlined word “invaluable”（in paragraph 2） means ________.

A．priceless

B．worthless

C．useless

D．helpless小题3: According to this passage, the gift of fitness will ________.

A．make moms feel prouder

B．let moms free from illnesses

C．keep moms having a healthy diet

D．encourage moms to do more exercise小题4: Which of the following would be the best title for this passage?

A．Better Pay Attention to Your Mother’s Health

B．Give the Gift of Fitness This Mother’s Day

C．Moms Like to Accept the Gift of Fitness

D．Help Your Mother Keep a Good Shape

在双线区间，列车应按左侧单方向运行，仅限于整理列车运行时，方可使列车反方向运行，但（）仅在正方向区间的线路（）、（）或（）等特殊情况下，经铁路局调度所值班主任准许，方可反方向运行。

全社会推动

项目融资与传统融资方式比较，所具有的特点包括( )等。

A．项目导向

B．有限追索

C．风险分担

D．公司负债型融资

E．融资成本较高