According to the passage, people could reduce the chance of suffering heart attack by ____?

A. They can't be bothered to design a business model.

B. They learn a lesson from the success of Facebook.

C. They will not make profits without drawing mass users.

D. They desire to receive an honorary degree from the alma mater.

A. confront with Blackboard as an equal

B. offer free service to the advertisers

C. cover businesses from courses to textbooks

D. Develop its own come-management software

A. increase fans in the faculty common room

B. launch its second version in 600 universities

C. make more classes from 600 institutions signed up

D. spread its influence within the same institution

A. Meet specific needs of students.

B. Learn useful information from friends.

C. Control the online class membership.

D. Monitor students' personal privacy.

A. It specializes in producing old hats.

B. It aims to improve the way universities work.

C. It invests $ 6m in the development of social network.

D. It promotes the communication among classmates.

A. It specializes in producing old hats.

B. It aims to improve the way universities work.

C. It invests $ 6m in the development of social network.

D. It promotes the communication among classmates.

A. there is no link between greenhouse gas emissions and destructive storms

B. reduction of greenhouse gas emissions may reduce destructive storms

C. the higher percentage of strong ones rose as more hurricanes appeared

D. past records on hurricanes included everything needed

A. It did not lose its strength as it moved.

B. It claimed over 200 people's lives.

C. It caused 80 billion dollars loss for Florida peninsula.

D. It lasted for full 24 hours.

A.is heating the hurricanes

B. evaporates and becomes fuel

C. heads toward land

D. turns into water vapor that makes hurricanes stronger