体内维生素B12主要吸收部位在（） A.肾脏组织 B.肠黏膜上皮 C.胃底腺 D.胃

小丽和小明要“测量食用油的密度”，请你帮助他们完善实验方案，并回答后面的问题：

 （1）小丽的方案：用调节平衡的天平测出空烧杯的质量m₁，向烧杯内倒入适量食用油，再测出烧杯和食用油的总质量m₂，然后把烧杯内的食用油全部倒人量筒内，读出__________；其测得食用油密度的表达式是：_ρ油=__________。 

（2） 小明的方案：在烧杯内倒人适量的食用油，用调节平衡的天平测出烧杯和食用油的总质量m₃，然后将烧杯内的部分食用油倒入量筒内，____________________ ____________________，读出量筒内食用油的体积V₂。即可测得食用油的密度。

（3）按_____________的实验方案进行测量，实验误差可以减小一些；如果选择另一种方案，测得的密度值_____________ (填“偏大”或“偏小”)。

（4）按小明的实验方案进行实验，已测得烧杯和食用油的总质量为34.1g。将烧杯内的部分食用油倒入量筒后，倒出油的体积如图(甲)所示为_____________cm³，烧杯和剩余油 的总质量如图(乙)所示为_____________g，则小明食用油的密度为_____________kg/m³。

残疾保险金的数额由（）两个因素确定

A.保险金额和残疾程度

B.保险金额和责任期限

C.残疾程度和责任期限

D.残疾程度和保险期限

第三节：完形填空（共20小题，每题1.5分, 满分30分）

Everybody gets unhappy. That’s why people eat a lot of  21  or spend lots of money on clothes—they think that these things will make them  22  !   23  , it is easy to create happiness, if you just have learned to be a  24  .

Giving  25  and resources to others who need them is a good thing to do. It will possibly contribute more to your happiness and to maintaining(保持) a   26   attitude than anything else. The key to successful family   27  is spending time staying with other family members. Give your time to your husband or wife,  28  time and resources to your children, and  29   they are the most valuable to you in the world.

Imagine this: a boy has  30  ,and you give him something of great  31  to him, such as by reading him a book. There is no  32  that you’ll see a big simile on his face. Maybe you’ll find that this is the happiest  33  of your life. You can also volunteer for a rescue service. There you will learn the meaning of“I cried  34  I had no shoes and then I saw a man who had no legs”.

Isn’t it true that the happiest people are typically those we consider foolish because they are  35  ready to give you the  36  off their back? It is also  37  that the most discontent(不满足的) people are the ones who are always making demands and never  38  others. Form the  39  of being a Big Giver, and then you will know one of the secrets to living a  40  and happy life.

21.A.junk food               B.meals                        C.fruits                        D.vegetables

22.A unhappy                 B.disappointed               C.happy                       D.satisfied

23.A.Mostly                   B.Actually                    C.Finally                      D.Naturally

24A.winner                    B.reminder                    C.receiver                    D.giver

25.A time                       B.money                      C.clothes                     D.food

26.A.positive

27.A.communication     B.negative

B.relationships       C.rude

C.hobbies       D.equal

D.topic

28.A. take                      B. bring                        C. devote                     D. lead

29.A.believe                   B.recognize                   C.understand                D.dream

30.A.something              B.nothing                      C.everything                 D.anything

31.A.value                     B.help                          C.use                           D.importance

32.A.wonder                  B.need                          C.doubt                        D.good

33.A.view                      B.person                       C.day                           D.moment

34.A.but                        B.because                      C.though                      D.if

35.A. never                    B.yet                            C.seldom                      D.always

36.A. clothes                  B. hat                           C. money                     D. life

37.A.true                       B.certain                       C.sure                          D.real

38.A.take in                   B.pay for                      C.care about                 D.worry about

39.A.culture                   B.custom                      C.look                         D.habit

40.A.healthy                   B.unforgettable              C.successful                  D.simple

习 * * 曾经形象地把理想信念比喻为 * * 党人精神上的“（）”。

A.脊梁

B.钙

C.风骨

D.灯塔

胎儿发育异常的分类错误的是

A．胎儿宫内发育迟缓

B．脑积水

C．联体儿

D．死胎

E．葡萄胎