A.FLVB.AVIC.WMVD.WAV下列（）不是视频文件格式。……

单项选择题设某交通信号灯红、绿、黄三种颜色的持续时间分别为40秒、60秒、20秒，循环往复。则“绿灯亮”携带的信息量是（）比特。

A.5
B.1
C.2
D.6

未分类题The authors attitude towards mixing of cultures is one of______.A．unrestricted enthusiasmB．eager advocacyC．genuine concernD．satisfied approval

未分类题Which group in the study had misconceptions about the body size of their peers?A．Female college students.B．Female students at co-ed schools.C．Female students at all-female schools.D．Female students at primarily male schools.

未分类题According to Sandersons research, who is more likely to have an eating disorder?A．A woman who lacks a serious exercise regimen.B．A woman who incorrectly believes her peers are thinner than she is.C．A woman who does not attend a co-educational institution.D．A woman whose family has a history of eating disorders.

未分类题It can be learned from the text that technological change______.A．makes life more convenient for all peopleB．keeps children from kicking a ball around in the parkC．can lead to the invasion of a person's home lifeD．particularly affects the lives of working people

未分类题By mentioning Spencer Rathuss work, the author intends to______.A．recommend this book to people with great stressB．manifest his opinion is different from that of Janet DiPietroC．prove that stress does have positive effect on peopleD．demonstrate people's bias towards stress's effect

未分类题Which of the following is not true according to the passage?A．More should be done to examine the exact way stress affects us.B．Stress can cause memory loss, even dementia.C．People may become more adaptable because of stress.D．The stress response emerged for human's survival.

未分类题The underlined word in Paragraph 2 means______.A．absolutelyB．partiallyC．variouslyD．equally

未分类题When does Sanderson speculate women dont mention lapses in their exercise regimens?A．When they are at the gym.B．When they are around their peers.C．When men are present.D．When they assume that their peers exercise more than they actually do.

未分类题This text is mainly about______.A．the status of minorities in scientific researchB．efforts to help underrepresented minority students pursue careers in scienceC．legal obstacles to minority students completing graduate studies in scienceD．government efforts to increase minority representation in science

未分类题In paragraph 4, '... the future is here, and technology is the name of the game' means that technology is______.A．overshadowing older methods of doing thingsB．the main characteristic of the present timeC．increasing at a rapid paceD．the necessary element for success in the present time

未分类题We can infer from the fifth paragraph that______.A．the University of California program is run in violation of federal lawB．in 1998, the HHMI awarded significantly fewer grants than it had in the pastC．legal battles have forced the closure of some programs designed to help minority studentsD．the HHMI has supported thousands of students through individual scholarships

未分类题According to the text, most programs intended to help minority students pursue further scientific training______.A．are not properly evaluatedB．struggle with insufficiencyC．have mixed resultsD．are surprisingly successful

未分类题Which of the following statements best represents the position expressed in the article?A．If we're not careful, technology will ruin our lives.B．Technology is the key to the world's future economic development.C．Technological change may not always be a good thing.D．Some benefit from technology more than others.

未分类题2013年10月，复旦大学研发出利用LED灯无线上网的Lifi，其最高单线传 输速率达到3.7Gbps。现假设在其理想状态下，通过该网络传输10000张图片 作品(1024×768,32位真彩色),大概需要的时间是( )。A、10 sB、 60 sC、1 sD、 600 s