问题 单项选择题

关于B细胞的说法,下列哪项说法错误()

A.细胞活化后转化成浆细胞,分泌抗体

B.B细胞表面CD19、CD20、CD22、CD23是全体B细胞共有标志

C.可以用单克隆抗体,通过间接免疫荧光法、酶免疫组化法或流式细胞技术等进行检测

D.目前将外周成熟的休止B细胞分为B1、B2两个亚群

E.B2细胞主要是外周成熟的常规检测的B细胞

答案

参考答案:B

单项选择题


李先生的家庭是典型的都市年轻夫妻一族,结构目前较单一,夫妻俩工作较稳定,事业上处于上升期,有住房无负债,负担较轻,但两年内准备迎接新生命的计划,使得家庭结构面临重大变化,为了让孩子有更好的成长环境,需要更换更大面积的住房,同时也要为即将到来照顾孩子的父母承担赡养费用。
面临未来,夫妻俩的负担更会加剧,对于孩子将来的学业前程有着较高的期望,同时对于未来的养老生活有着高品质的要求,因此对李先生家庭而言,在准备短期子女出生费用和换房费用后,需投资一定比例的资金来保证子女能拥有优良的教育条件,保证父母能够安度晚年,保持资产的流动性来抵御不确定的风险,为自已将来的医疗和养老做好准备,是家庭理财的重要目标。
一、案例成员
家庭成员年龄职业
李先生29岁金融从业人员,结婚三年
李太太29岁金融从业人员,结婚三年
李先生父母58岁原在乡下务农,无积蓄无退休金
二、家庭收支状况
                 表1 每月收支情况表 (单位:元)
每月收入每月支出
李先生工资收入(税后)3807.5物业费350
李李太太工资收入(税后)2372衣食费1500

交通费

400
医疗费100
合计6179.5合计2350
每月结余(收入-支出)3829.5

                 表2 每年收支情况表 (单位:元)
每年收入每年支出
李先生工资收入(税后)45690物业费4200
李李太太工资收入(税后)28464衣食费18000

交通费

4800
医疗费1200
合计74154合计28200
每年结余(收入-支出)45954
三、家庭资产负债状况
                 表3 家庭资产负债表 (单位:元)
家庭资产家庭负债
流动性资产20000贷款0
现金及活存0房屋贷款(余额)0
货币基金20000

汽车贷款(余额)

0
投资性资产147000消费贷款(余额)0
定期储蓄50000信用卡0
住房公基金帐户47000信用卡未付款0
个人养老金帐户50000自用负债0
固定资产300000
房产300000
资产总计467000负债总计0
净资产(资产-负债)467000
四、保险方面 李先生夫妻没有为自己购买保险。 五、家庭理财目标
短期目标1.为两年内生育子女做准备
2.准备两年后更换更大面积的住房
长期目标1.子女直至大学毕业的生活教育费用
2.科学事业怀父母至85岁的生活赡养费
3.准备夫妻60岁退休到85岁的生活费用
4.准备充足的保险
六、假设条件
1.收入成长率5%、学费成长率4%、房价成长率3%、通货膨胀率2%。住房公积金账户投资报酬率为2%,养老金账户投资报酬率为4%,自行投资的报酬率为6%;
2.预测收入增长率:5%;
3.房价成长率:3%;
4.教育支出增长率:4%;
5.社保投资报酬率为4%;
6.医疗保险金与失业保险金各提拨1%,住房公积金个人与单位各提拨6%,养老金账户个人提拨6%,单位提拨20%;
7.换房后房贷住房公积金利率为5%,一般贷款利率为6.3%,贷款20年。公积金贷款上限每人30万元。

孩子教育资金的准备宜尽早筹划,定期积累,专款专用,可以通过教育储蓄、教育保险、国债、理财产品、定期定额投资基金等多种方式予以实现。下列说法不正确的是( )。

A.由于教育费用没有弹性且可以预知时间,所以需重视安全性

B.教育策划更重视长期的管理,越迟准备,财务负担和压力越大

C.如果是很长时期后需要使用的学费,建议采用期限固定、保证受益的投资品种

D.多年以后才需要的教育费用,则可选用中等风险的配置型基金作为投资手段,通过时间来平滑资产收益的波动性。

单项选择题

A child who has once been pleased with a tale likes, as a rule, to have it retold in almost the same words, but this should not lead parents to treat printed fairy stories as formal texts. It is always much better to tell a story than read it out of a book, and, if a parent can produce what, in the actual situation of the time and the child, is an improvement on the printed text, so much the better.

A charge made against fairy tales is that they harm the child by frightening him or making him sad thinking. To prove the latter, one would have to show in a controlled experiment that children who have read fairy stories were more often sorry for cruelty than those who had not. As to fears, there are, I think, some cases of children being dangerously terrified by some fairy story. Often, however, this arises from the child having heard the story once. Familiarity with the story by repetition turns the pain of fear into the pleasure of a fear faced and mastered.There are also people who object to fairy stories on the grounds that they are not objectively true, that giants, witches, two-headed dragons, magic carpets, etc. do not exist; and that, instead of being fond of the strange side in fairy tales, the child should be taught to learn the reality by studying history. I find such people, I must say so peculiar that I do not know how to argue with them. If their case were sound, the world should be full of mad men attempting to fly from New York to Philadelphia on a stick or covering a telephone with kisses in the belief that it was their beloved girl-friend. No fairy story ever declared to be a description of the real world and no clever child has ever believed that it was.

According to the passage, great fear can take place in a child when the story is ().

A. in a realistic setting

B. heard for the first time

C. repeated too often

D. told in a different way