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问题 选择题

在化学反应mA + nB ＝ kC+ fD中，下列说法正确的是

A. 化学计量数m与n之和一定等于k与f之和

B. 若A和C都是盐，则该反应一定是复分解反应

C. 反应中A、B的质量比一定等于C、D的质量比

D. 若取10 g A和10 g B反应，生成C和D的质量总和不一定是20 g

答案

答案：D

A、化学计量数是为了保证反应遵循质量守恒定律，m与n的比不一定等于k与f的比．故错误

B. 若A和C都是盐，则该反应不一定是复分解反应，故错误

C. 反应中A、B的质量比不一定等于C、D的质量比，故错误

D、若完全反应生成C和D的质量总和一定是20 g，不完全反应生成C和D的质量总和不一定是20 g，故正确

故选D

阅读理解

※When parents get angry, it isn't the time to get angry back. A lot of times they're not upset with you, but with their boss, the neighbor, or the price of vegetables. You just happen to be there at the wrong time. Look hurt? Get out of the way when they're in a bad mood. They need some time and space. Go outside, to a friend's house, or to your room. At last they will become calm and miss you.
※If you have trouble talking to your parents, or if they get angry every time you try to discuss something, write a note. Put it on their bedside table. Parents are easily moved by notes like this and will probably keep them forever.
※Do not create situations where there is a winner and a loser. You're the child and will probably lose most of the time. How many times have you grounded your mother or taken away the phone privileges(特权) from your dad? Try to compromise with each other and work out a situation where both of you win.
※Ask your parents once a day, "Is there anything I can do for you?"  Most of the time they will probably say no, or give you something that will take a few minutes to complete. Your parents will love this and see you as a very cooperative(可合作的) person. When this happens, they will probably be more cooperative with you. You could also surprise them by doing something they don't make you do. They'll tell everyone you are the best possible son or daughter and, what's more, they will believe it.
※Click for more information at the red icon on the left.
小题1:Leave a note on your parents’ bedside table if___________.
A．your parents quarrel with each other
B．you find it difficult to talk with them
C．you want to be the best possible child
D．you go outside to your friend’s house
小题2:From the above we learn_________.
A．if we want to help do house work, parents always refuse us.
B．your parents will be hurt if you get angry back at a wrong time.
C．parents often ground children and control their use of the telephone
D．if we want to discuss with parents, we should wait till they are happy
小题3:The underlined word “compromise” probably means_________.
A．抗争B．妥协C．承诺D．辩论
小题4:What’s the topic of the above?
A．How to cooperate with family and friends
B．Arguments between children and parents
C．Tips for teenagers on family problems
D．Advice on educating angry children
小题5:You can read the above _________.
A．in a magazineB．in a newspaper
C．in a posterD．on the Internet
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单项选择题 B型题

关于骨巨细胞瘤说法正确的是（）

A.多个形态不一的血腔，周边较多破骨细胞型巨细胞，血腔间隔内有异型细胞，见少量肿瘤性骨样组织及骨质

B.由单核基质细胞和散在其间的多核巨细胞组成，并见纤维组织、新生骨组织、泡沫细胞以及出血、空腔形成

C.可见大小不等的血腔，内囊面不完整地衬覆内皮细胞囊腔间隔内可见出血及多少不等的多核巨细胞，组织细胞、富有含铁血黄素的吞噬细胞和炎细胞，并见新生骨小梁

D.单房性空腔，囊壁内层由疏松结缔组织构成，富含血管，可见出血、胆固醇裂隙、黄色瘤细胞及多核巨细胞，囊壁深层可见骨样组织和不成熟的骨小梁

E.肿瘤由具有一定异型性的成纤维细胞、组织细胞、良性或恶性多核瘤巨细胞及炎性细胞组成，成纤维细胞排列成车辐状
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