Which of the following is true about the Braess paradox?
A．A mathematician of a university in Seoul came up with it.
B．People first identified it in the 1920s.
C．The Americans didn't pay much attention to it in the first place.
D．It claims that more capacity brings about more efficiency.

未分类题Why does the author assert that only through travel we 'truly touch one another'?A．He wants to emphasize tourism's powerful effect on combating social problems.B．He believes tourism makes it possible for people to help one another.C．He believes travel is the only way cultures can learn about each other.D．He thinks that sincere learning of a culture is only possible by travel.

未分类题From the text, we know that the authors greatest worry is______.A．our lack of technological understanding of the process involvedB．our lack of technological capabilityC．creating technology without really understanding the issuesD．our refusal to face the consequences of the technology we create

未分类题通过crm企业可以获得的收益有()。

未分类题From the first paragraph we learn that the travel industry______.A．is going to give money to aid povertyB．has improved its revenueC．is financially healthier than everD．is better able to help reduce poverty than ever

未分类题A police officer, questioning suspects who are not under arrest, must inform. suspects of their ______.A．Miranda rightsB．right to an attorneyC．freedom to leaveD．right to make a phone call