下列关于伴性遗传方式和特点的说法中，不正确的是( )

A.伴X染色体显性遗传：女性发病率高，若男性患病，其母、女必患病
B.伴X染色体隐性遗传：男性发病率高；若女性患病，其父、子必患病
C.伴Y染色体遗传：父传子、子传孙
D.伴Y染色体遗传：男女发病率相当；有明显的显隐性关系

不等式的解集是  　　．

下列说法正确的是（　　）

A．形成离子键的阴阳离子间只存在静电吸引力

B．HF、HCL、HBr、HI的热稳定性和还原性依次减弱

C．第三周期非金属元素含氧酸的酸性从左到右依次增强

D．元素周期律是元素原子核外电子排布周期性变化的结果

中国人民银行决定，从2011年4月21日起，上调存款类金融机构人民币存款准备金率0.5个百分点。这是央行2011年以来第四次上调存款准备金率。同时，这也是央行自2010年以来准备金率的第十次上调。央行上调存款准备金率(　　)。

①有利于控通胀、稳物价　              ②意味着市场上商品价格必然下降

③有利于抑制信贷投资规模，减少流动性　④有利于调动储户的存款意愿

A．①②  B．③④  C．①③  D．②④

根据价值规律的要求，商品是按照社会必要劳动时间所决定的价值量进行交换的。这就会（　　）
①导致商品生产者的优胜劣汰    ②调节生产资料和劳动力在社会各部门的分配
③刺激商品生产者改进技术，改善经营管理，提高劳动生产率
④使商品的使用价值与价值相符

    A．①②    B．①③     C．①④     D．②③

 有学者指出，“资本主义的逻辑最终必然到达全球范围，它从16世纪在欧洲诞生到今天已经真正达到全球范围，”“整个世界都是在这个单一的我们称之为资本主义世界经济的社会分工架构之内运作的。”这位学者实际上是强调

A.经济全球化同科技革命紧密联系         

B.资本主义在全球化过程中的核心作用

C.各国政治经济体制日益融为一体         

D.经济全球化以全球的市场经济为基础

在生物体内含量极少，但对维持生物体正常生命活动必不可少的元素有（    ）

A．Fe、Mn、Zn、Mg                              B．Zn、Cu、Mg、Ca

C．Zn、Cu、B、Mn                                D．Mg、Mn、Cu、Mo

下列关于硅及其化合物的说法正确的是

A．硅酸盐中的阴离子都是SiO₃^2—

B．单质硅可用于制造光导纤维

C．二氧化硅既可以与烧碱溶液反应又能与氢氟酸反应，故属于两性氧化物

D．Na₂SiO₃是最简单的硅酸盐，其水溶液可用作木材防火剂

February 14^th is Valentine’s Day! In China, it is only a day for young boyfriends and girlfriends. But my teacher and friends in America told me that Valentine’s Day is a public day.

This was my first Valentine’s Day in America. I didn’t understand the customs(风俗) clearly. Maybe I didn’t need to send any gifts. I watched others to see what they did, so next time I can understand.

On that day, when we began the reading class, Mr. Peters gave every student some chocolates and said, “Happy Valentine’s Day!” I was very happy the teacher gave his students gifts and blessings. I never saw that in China. Maybe American teachers are very different. I didn’t buy a gift for the teacher, so I owed(欠) a gift to the teacher. Anyway, I want to say, ”Thank you, Mr. Peters, and I’m sorry.”

When we had a break, one of my classmates gave me a Pokemon card. It was very funny and I felt thankful, but I thought I owed a gift again.

When we were coming to our grammar class, suddenly I heard someone calling me. ”Shelly!” I stopped. Another classmate who had only been in our class one day gave me some chocolates. She said, “These are for you and your friends. Have a good day!” I was looking at her leaving and thinking that we were in the same class only one day, but now we are friends. That’s very great, but I owed a gift again.

When I came home, my Chinese friend sent some roses and chocolates. I was surprised and happy because I had never received roses in my past life, but I hoped it was the last gift. I didn’t want to owe more gifts.

4. Before the writer left China, she thought Valentine’s Day _______.

A.     was a day for the young

B.     was different in America

C.     was a festival for all the people

D.     was a holiday for the students

5.  By saying “I never saw that in China,” the writer would like to tell us that in China _________.

A.     the students gave gifts to the teachers

B.     the teachers didn’t like the students at all

C.     the students never received any gifts and blessings

D.     the teachers wouldn’t give their students any gifts

6.  The writer felt sorry probably because she ________.

A.     made a mistake in class

B.     didn’t like chocolate

C.     had no gift for Mr. Peters in return

D.     had no money to buy gifts

7.  What was the first gift the writer received from his classmates?

A.     A toy.  B. A card.   C. Some chocolates.  D. Some roses.

 卷舌（A）对不卷舌（a）为显性，某三口之家中，母亲及其独生女儿不卷舌，则该女儿的母亲和父亲的基因型分别可能为 ( )

A.aa和AA   B.AA和aa   C.aa和Aa   D.Aa和aa

函数的零点所在区间是　　

A.                B.                C.                D.

“中国制造2025”已上升为国家战略，这必将促使我国从制造大国转向制造强国。建设制造强国，既需要领军型人才，也需要大批技能高超的技工队伍。这主要是基于（    ）

A．劳动者在生产力发展中发挥着主导作用

B．劳动者素质是先进生产力的集中体现和主要标志

C．健全生产要素按贡献参与分配制度的内在要求

D．保障劳动者合法权利、构建和谐劳动关系的需要

His ____ of life has changed a lot since the experience he had in Africa three years ago.

   A. sight            B. attitude             C. view         D. altitude

哺乳动物的精子和卵细胞形成过程中的不同点是（   ）

A．染色体复制     B．纺锤丝的形成   C．细胞质的分裂    D．染色体着丝点分裂

．1930年12月，时任美国总统的胡佛说：“经济不景气的问题是绝不能用立法的行动或行政的声明来解决的。”由此可以看出他依旧坚持的是

A．计划经济思想  B．新经济政策  C．自由主义经济思想 D．国家全面干预经济思想

23．在20世纪80年代初的试点改革中，一些国营企业从 “等米下锅”发展到主动“找米下锅”，从“吃不饱”到“吃不了”。发生这种变化的主要原因在于(　　)

A．企业自主权逐步扩大                              B．企业所有权和经营权完全分离

C．企业融入大量外资                          　　D．社会主义市场经济体制确立

已知函数

   (1)求f(x)的定义域和值域.

   (2)求函数f(x)的周期和单调区间。

已知函数f（x）=|2x+1|﹣|x|﹣2．

（1）解不等式f（x）≥0；

（2）若对任意的实数x，都有f（x）﹣2a²≥|x|﹣3a﹣2，求实数a的取值范围．

 . Of course you don’t want to be sick in your vacation. So what can you do while traveling? There are three things you should remember: relax, sleep and eat well.

　　A vacation is a time for relaxing, but very often it is not. Think about what you do when you are a tourist. There are so many places to visit: shop, parks, churches and temples (寺庙). You may spend most of the days walking around these places. This can be very tiring. Do not ask your body to do too much. A tired body means a weak body. A weak body gets dick easily. So sit down for a few hours in a nice place. In good weather, look for a quiet park bench.

　　Sleep is also important. If you want to stay healthy, you need to get enough sleep. Your hotel room may be noisy, or the bed may be too hard. Or you may want to stay out late at night. Then you should plan to sleep for an hour during the day. The extra  hour can make a big difference.

　　Finally, if you want to stay healthy, you must eat well. That means eating the right kinds of food. Your body needs fresh fruit, vegetables, mean, milk and cheese.

　　So, remember this:  if you want to enjoy your vacation, take good care of yourself. Give your body some rest. Get enough sleep and eat healthy food.

23. Traveling is usually ____.

A. easy                    B. noisy                    C. tiring                     D. dangerous

24. You must ___ to enjoy your traveling.

　　A. visit parks                                       B. stay healthy

C. go to churches and temples         D. sit down for a few hours

　25. The text tells us ____ in traveling.

　　  A. how to rest                            B. what places to visit

C. how to relax and sleep           D. how to take good care of ourselves

近年来，我国“舌尖上的浪费”非常严重，每年餐桌上浪费的粮食相当于2亿人一年的口粮，然而我国目前还有一亿多农村扶贫对象、几千万城市贫困人口等待脱贫。2014年5月，中宣部、国家发改委发出开展节俭养德全民节约行动的通知，要求深入进行节俭节约宣传教育，广泛开展多种形式的节俭节约实践活动，在全社会营造厉行节约、拒绝浪费的浓厚氛围。要把开展节俭养德全民节约行动作为培育和践行社会主义核心价值观的重要载体，引导人们以俭养德、以俭修身，使节俭节约成为日常生活习惯和自觉行动。

根据材料，运用生产与消费的相关知识评析观点“节俭是好事，消费是坏事”。