听第10段材料，回答第18至20题。
( ) 18. How many web logs were studied by Perseus the research company?
A. More than 10,000.
B. More than 3,000.
C. More than 30,000 web logs.
( ) 19. Why are blogs most popular with teenage girls?
A. They can inform their friends of what is happening in their lives.
B. They can present political and other ideas freely.
C. They can publish books after a period of time.
( ) 20. What is true about Rebecca?
A. She closed her free blog service last week.
B. She was upset when her favorite site was closed.
C. Her website is still strong and it is about the history of blogs.
[单选题]H．ow many sailors were held by the pirates up to the time of the report?A．228.B．77.C．383.D．305
[单选题]H．ow many students were shot dead in 1997 in US schools?A． 10B． 9C． 12D． 22
[单选题]H．ow many students were shot dead in 1997 in the US schools?A． 9B． 10C． 12D． 22
[判断题]The bills of lading must show how many signed originals were issued and all
[判断题]The bills of lading must show how many signed originals were issued and all
It was 1)____!A: How many 2)____?B: Oh, a lot of people. They were all very 3)__
Shes lived in Washington, D.C. for many years and she studied fashion.M: How lon
[主观题]H．ow to set many-to-many relationship in Hibernate?
[主观题]H．ow were your scores in college?
(), how can I get to the Kodak company?A. I'm sorryB. Please tell meC. WellD. Ex