具体的说，证券经纪商在代理业务中所承当的义务包括()。
A . A、认真与客户签定证券买卖代理协议，坚持了解客户的原则，忠实办理委托业务
B . B、经纪商对委托人的一切委托事项付有保密义务，未经委托人许可严禁泄露
C . C、经纪商对委托人的委托买卖内容及缴纳保证金和证券库存的变化必须有真实的凭证和详实的记录
D . D、为客户融资、融券，从事信用交易
E . E、接受代为客户决定证券买卖品种、数量、时间或买卖方向的全权委托
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已知亲代中，每种颜色都为纯系，有以下杂交组合：杂交一：P：紫×白F1：红F2：红：紫：白＝9：3：4；杂交二：P：紫×白F1：紫F2：紫：红：白＝9：3：4；杂交三：P：紫×白F1：白F2：白：紫：红...令杂交三的F1与杂交二的F1杂交，则后代的表型比为（）。
A.1：1：0
B.2：1：1
C.3：3：2
D.4：3：1
E.9：6：1
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Have you (61) asked yourself why children go to school You will probable say that they go (62) their own language and other languages, arithmetic, history, science and (63) subjects. That is quite true; but why do they learn these things And are these things (64) that they learn at school We (65) our children to school to (66) them for the time (67) they will be big and will have to work (68) themselves. Nearly all they study at school has some (69) use in their life, but is that the only reason (70) they go to school There is (71) in education than just learning facts. We go to school (72) all to learn how to learn, (73) when we have (74) school we can continue to learn. A man who really knows (75) will always be successful, because (76) he has to do something new which he. Has never had to do (77) , he will rapidly teach himself how to do it in the best (78) . The uneducated person, (79) , is probably unable to do something new, or does it badly. The purpose of schools, therefore, is not just to teach languages, arithmetic, etc.., (80) to teach pupils the way to learn.
Have you (61) asked yourself why children go to school You will probable say that they go (62) their own language and other languages, arithmetic, history, science and (63) subjects. That is quite true; but why do they learn these things And are these things (64) that they learn at school We (65) our children to school to (66) them for the time (67) they will be big and will have to work (68) themselves. Nearly all they study at school has some (69) use in their life, but is that the only reason (70) they go to school There is (71) in education than just learning facts. We go to school (72) all to learn how to learn, (73) when we have (74) school we can continue to learn. A man who really knows (75) will always be successful, because (76) he has to do something new which he. Has never had to do (77) , he will rapidly teach himself how to do it in the best (78) . The uneducated person, (79) , is probably unable to do something new, or does it badly. The purpose of schools, therefore, is not just to teach languages, arithmetic, etc.., (80) to teach pupils the way to learn.
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参考答案
十点题库官方参考答案
（由十点题库聘请的专业题库老师提供的解答）
