磁铁的磁性具有一定范围，距磁极越近磁性越强，反之就越弱。

外科创伤病人进行营养评定，下述指标中可反映体细胞群的指标是（）。

A.三头肌皮褶厚度

B.上臂肌围

C.可变换钾、钠总量

D.氮平衡

E.肌酐身高指数

某工程业主与设计单位签订了合同价为50万元的设计合同，业主支付给设计单位定金10万元。该业主与承包商签订了施工合同，业主支付给承包商预付款20万元。下列表述中，错误的是( )。

A．设计单位不履行合同时，应当支付给业主20万元

B．承包商不履行合同时，应当支付给业主40万元

C．设计合同履行后，定金10万元可冲抵设计费

D．施工合同履行过程中，业主可逐步扣回预付款20万元

Expressing gratitude is an important form of good manners. Nowadays more and more people in China have found it’s high time to (1) a thankful heart for the young.Everyone likes to get praised and appreciated. Gratitude is the greatest of virtues, which lets others smile and makes the world more beautiful. You just need several minutes to write down a thank-you note, but it brings much joy to the (2) .We live in a society where we enjoy the different services of others. But (3) of them should be taken for granted.Gratitude is also a kind of (4) in life. In developing gratitude for every moment—for the simple joys and even for the (5) times—we come to truly enjoy and appreciate life. Then we are able to see the (6) that surrounds us.Try to write a thank-you letter to your parents for working hard to (7) you a happy life.Be grateful to your teachers because of their (8) with your studies and character building.Say thanks to your friends who (9) both your happiness and sorrow. We are sure it will bring them much joy and add (10) into your own life as well. 

第（3）空应选择（）

A．one

B．any one

C．none

D．all

自尊是个体对其社会角色进行( )的结果。

A．承诺

B．赞许

C．自我认同

D．自我评价

在CBM中，作者机构限定检索有哪些优势？（）

A、支持作者精确定位

B、解决“同名著者”、“同构异名”问题

C、提高查准率

D、提高查全率