When does Miralda-Escude estimate the first star appeared?
A．75 million years ago.
B．14 billion years ago.
C．14 billion years after the big bang.
D．75 million years after the big bang.

未分类题By mentioning an organization in San Diego, the author intends to______.A．encourage institutions to do interdisciplinary researchesB．state many institutions strive to study set environment's influence on humansC．prove that researches in neuroscience have been in popularityD．advocate that architecture schools should involve introductory neuroscience

未分类题We can learn from Paragraph 1 that______.A．the average adult sleeps one and a half hours less than last centuryB．24-hour entertainment offers those who can't sleep a way to kill timeC．lack of sleep may harm one's health and even threaten his her lifeD．people always don't have the incentive to get more sleep

未分类题How does the author feel about the current lack of technological literacy?

未分类题The underlined word in Paragraph 1 means______.A．obligationB．sleepC．hibernationD．vacation

未分类题According to the text, the purpose of RoboCup is to______.A．create a world ruled by robotsB．eliminate the need for human athletesC．test out artificial intelligence technologyD．for scientists to get together and have a good time

未分类题Mole rats are similar to humans in that they______.A．are virtually hairlessB．live in underground coloniesC．have opposable thumbsD．are able to kill parasites

未分类题Which of the following is the best title for the text?A．Everyone desires a good night's sleepB．A study on less sleep's jeopardyC．More sleep doesn't mean better lifeD．Less sleep, more heart disease

未分类题According to the author, technology______.A．is the key to eliminating the gap between the rich and the poorB．has led to many of society's fundamental changesC．is literateD．has caused war to be focused more heavily on nuclear confrontation

未分类题The authors attitude towards the study on architectures influence on human is______.A．confidentB．pessimisticC．unconvincingD．impracticable

未分类题According to the article, which of the following is true about Kamen?A．His invention is marketed exclusively to corporate clients.B．He has over 150 patents.C．He believes that his Segway might revolutionize human transportation.D．He has gray hair.

未分类题According to the text, when might communication difficulties arise?A．When the messages sent do not fit the social norms expected by the receiver.B．When there is mutual distrust between the involved parties.C．When the parties involved strongly desire interaction.D．When the parties involved fail to use nonverbal cues.

未分类题Kamen believes that the entrepreneurial life______.A．is the only way to succeed in modern AmericaB．is always frustratingC．is not for everyoneD．is often misrepresented in the media

未分类题呼叫中心的基本结构包括下面的()。

未分类题数据仓库具有的特点包括()。

未分类题When the retina reflects the beams, what occurs?A．Patients have trouble seeing.B．The ability to focus is gone.C．No correction is needed.D．The lens bends the light beams.