（10宜昌15）．除去下列物质中的杂质，所用的试剂和方法不正确的是 A．除去二氧

从方框中选词，并用其

there be, have got, some, friend, photo

Dear Jenny,
        Thank you for your last email. How is everything in China? How many students 1. _____ in your class? Have
you got    2._____ new friends? I 3. _____ a new teacher-Mr Green. His daughter and son are my good 4. _____ .
Do you like China? Do you like your school? Please send(发送)an email to me and send me some 5. _____ of your
school. Thanks.
                                                                                                                                                                                       Yours, 
                                                                                                                                                                                        Bill

“欲观周之所以定天下，必自其制度始矣… 一曰(   )之制，由是而生宗法及丧服之制，并由是而有封建子弟之制、君天下臣诸侯之制… ”括号中应为

A．“立子立嫡”

B．“世卿世禄”

C．“封建亲戚”

D．“敬天法祖”

下列不属于商业银行进行债券投资目标的是()。

A.降低资产组合的风险

B.提高资本充足率

C.提高流动性

D.平衡流动性与盈利性

某油罐有蜡50吨，比重为0.8，如果油罐的底面半径为5m，问：油高是多少？ 

暑伤肺气则（），暑滞肺络则（）。