武汉全球通客户A与B，同时漫游在北京，A拨打B，通话时长为4分27秒。B应收取（）元

某同学的父母均有酒窝，而他本人没有．已知有酒窝由基因B控制，无酒窝由基因b控制，请回答：

（1）该同学父母均有酒窝，而他却无酒窝的现象叫______．

（2）该同学的基因组成是______，他父亲、母亲的基因组成是______．他父母后来又生了一个有酒窝的小弟弟，那么他弟弟的基因组成可能是______．

（3）他们的父母是通过______把这些基因传给他和他弟弟的．

The library is one of the most popular places at a western university. Students turn to it for research, conversations about class, and many other services.

Compared with Chinese libraries, college libraries, college libraries in the US and UK tent to offer more resources. A postgraduate at Yale University can borrow as many as 225 books at a time.

In addition to borrowing books, there are online and electronic resources. These include a database search of popular and academic material, such as LexisNexis Academic, which offer items from newspapers and magazines.

Although books and articles are the items that students ask for most frequently, some libraries provide audio and video recordings, maps and sheet music （活页乐谱）. At some schools, teachers and tutors put electronic copies of their teaching PPTs on the library Web to give easier access for students.

Another useful service in Western college libraries is the Interlibrary Loan. This allows a student at one school to borrow books from another school. The loan request is make through the student’s college library, which gets the book, gives it to the user, and arranges for its return.

Technology has brought more services to students and has made libraries attractive. Some universities have services for students to send messages through the computer or mobile texts to ask the library staff for information.

Earlier this year, Harvard University introduced a new Scan and Deliver service, allowing students to make requests for parts of books and articles. Requests made through the system are handled by library staff. The student receives and e-mail with an Internet link to the scanned pages. The service is free and all material comes within four days.

It used to be that libraries didn’t allow food or drinks. But that rule is changing and many of them now contain a café so students can spend as much time as they want in the library.

Actually, some US university libraries are now all-night affairs, or have at least one study room open all night.

1. In Western college libraries a postgraduate can ______.

A. have a free drink or a meal

B. borrow as many books as they want

C. access not only books but other study resources

D. ask questions and get answers from their tutors

2. LexisNexis Academic is the name of ______.

A. a database

B. a library

C. a university

D. a guide

3. How can a college student borrow books from other college’s libraries?

A. By going to these libraries.

B. By getting them through the Internet.

C. By sending messages through the computer or mobile texts.

D. By borrowing them through their own library.

4. Which of the following statements is TRUE?

A. Chinese library services are better than western ones.

B. Library staff play an important role in college library service.

C. Postgraduates can post their own PPTs to the library website.

D. 24-hour services are adopted in all western libraries nowadays.

5. Why are university libraries more attractive now?

A. Because students can eat and drink there at any time.

B. Because students can have a stay-over there all night.

C. Because students can enjoy quicker and more convenient services.

D. Because students can borrow anything they want there.

牛奶红茶调饮冲泡法中调饮的方法是将（）。

A、牛奶冲泡茶叶

B、茶与牛奶和糖一起冲泡饮用

C、茶与牛奶和糖一起煮沸

D、茶汤过滤，再加牛奶和糖

已知X商品的价格为5元，Y商品的价格为2元，如果消费者从这两种商品的消费中得到最大效用时，商品Y的边际效用为30，那么此时X商品的边际效用为（）

A.60

B.45

C.150

D.75

Henry O. is a firm believer in capital market theory and the capital asset pricing model. Henry has developed a model to select overpriced stocks as indicated by the security market line. The model identifies the overpriced securities and then executes a short position in the overpriced stock. Which of the following practical conditions would prevent Henry from using his model to explain capital market behavior（）

A. All investors use exactly the same two-stage dividend discount model to evaluate stocks.  B. All investors pay the same commission rate of $ 0.03/share on all equity trades. 

C. All borrowing and lending is done at a rate equal to the return on a 6-month Treasury bill.