简述直肠癌的临床表现。

通过核磁共振氢谱可以推知(CH₃)₂CHCH₂CH₂OH有多少种化学环境的氢原子[ ]

A．6

B．5

C．4

D．3

关于热原的叙述，正确的有（）

A.热原是一种能引起动物体温升高的致热物质

B.细菌中以革兰氏阴性杆菌所产生的热原致热能力最强

C.真菌也能产生热原

D.病毒也能产生热原

E.热原是微生物的尸体及代谢物

Many times when people hear the words social networking, their brains automatically go to sites such as Twitter or Facebook．However, there are sites for those into social networking and into reading． Sound crazy? It's really not．

If you' ve ever wanted a site where you can receive book recommendations, follow your favorite authors, and keep up with what your friends are reading．then look no further than Goodreads, com．

Goodreads provides useful services for those in the reading world, It is a site where you can win books by going to giveaways and simply entering your information．Some giveaways are even signed by the author．And the books aren't boring, old or torn copies - many of them are ARC’s （Advanced Readers Copies）, for which you can write a short review on the site．Anyone can post reviews of their favorite books or series so that others may feel inclined to read them as well．

Another function of the site is offering book clubs and interest groups．You can have interactive discussions with groups of people reading the same things, sort of like a blog．You can also make friends with people and post statuses similar to Facebook．Your friends can send you hook recommendations and you can add them to your shelf if you choose．

Shelves are by far one of the best features on the site．You can categorize your entire library and put hooks you want to read on your "to - read" shelf．These virtual （虚拟的）shelves allow you to see what you' ve read and also let you keep track of the number of books you' ve read in a year．

You can even read original writing for free because many people post their own writing on the site to gain feedback and advice on how to improve．Anyone can join this site for free and fall in love with not just a hook, but a book site as well．

小题1:People who go to the site Twitter mostly want to              ．

A．get more books to read

B．buy goods for their daily life

C．Set to know more people

D．post their book recommendations小题2:According to the author, if you want to interact with others about reading,            ．

A．you have a lot of websites to log on

B．you'd better go to Goodreads．com

C．you should go to bookstores or libraries

D．you can go to Twitter or Facebook小题3:The underlined part "feel inclined" in．Paragraph 3 is the closest in meaning to “____” ．

A． have a tendency                                                 C． have no difficulty

C． have a possibility                                                D． have no doubt

小题4:You can do all of the following things on Goodreads．com EXCEPT         ．

A．receiving books signed by the authors

B．publishing your comments on books

C．exchanging your ideas with other people

D．buying all kinds of books that you like小题5:What do we know about the shelves on Coodreads．com?

A．They are filled with all kinds of books from some libraries．

B．They are real bookshelves presented to readers by the site．

C．That is where people put books they have read or want to read．

D．New books will continuously be added to readers shelves by the site．

Java语言中所有的简单数据类型都被包含在( )中。

A．java.sql

B．java.awt

C．java.lang

D．java.math

肌肉痉挛的原因和机理