题目内容

在心电图纸上纵向的1mm小格代表的是()

A. 0.1v
B. 0.1mv
C. 0.1s
D. 0.01s
E. 0.04s

查看答案
更多问题

在心电图纸上横向的1mm小格代表的是()

A. 0.1v
B. 0.1mv
C. 0.1s
D. 0.01s
E. 0.04s

在标准导联所反映的是()

A. 两肢体间的电位差
B. 身体某一部位的电位变化
C. 右心室的电位变化
D. 左心室的电位变化
E. 两心房的电位变化

There’s no question that the Earth is getting hotter. The real questions are: How much of the warming is our fault, and are we __1__ to slow the devastation by controlling our insatiable __2__ for fossil fuels?Global warming can seem too __3__ to worry about, or too uncertain --- something projected by the same computer __4__ that often can’t get next week’s weather right. On a raw winter day you might think that a few degrees of warming wouldn’t be such a bad thing anyway. And no doubt about it: Warnings about __5__ change can sound like an environmentalist scare tactic meant to force us out of our cars and restrict our lifestyles.Comforting thoughts, perhaps. Unfortunately, however, the Earth has some discomforting news.From Alaska to the snowy peaks of the Andes, the world is heating up right now, and fast. Globally, the __6__ is up 1F over the past century, but some of the coldest, most remote spots have warmed much more. The results aren’t pretty. Ice is __7__, rivers are running dry, and coasts are __8__, threatening communities.The __9__ are happening largely out of sight. But they shouldn’t be out of mind, because they are omens of what’s in store for the __10__ of the planet.A.remote B. techniques C. consisting D. rest E. willingF.climate G. skill H. appetite I. melting J. vanishingK.eroding L.temperature M. curiosity N. changes O.skillful

If our society ever needed a reading renaissance, it’s now. The National Endowment for the Arts released “Reading at Risk”last year, a study showing that adult reading __1__ have dropped 10 percentage points in the past decade, with the steepest drop among those 18 to 24. “Only one half of young people read a book of any kind in 2002. We set the bar almost on the ground. If you read one short story in a teenager magazine, that would have __2__,”laments a director of research and analysis. He __3__ the loss of readers to the booming world of technology, which attracts would-be leisure readers to E-mail, IM chats, and video games and leaves them with no time to cope with a novel.“These new forms of media undoubtedly have some benefits,”says Steven Johnson, author of Everything Bad is Good for You. Video games __4__ problem-solving skills; TV show promote mental gymnastics by __5__ viewers to follow complex story lines. But books offer experience that can’t be gained from these other sources, from __6__ vocabulary to stretching the imagination. “If they’re not reading at all,”says Johnson, “that’s a huge problem.”In fact, fewer kids are reading for pleasure. According to data __7__ last week from the National Center for Educational Statistics’long-tern trend assessment, the number of 17-yearr-olds who reported never or hardly ever reading for fun __8__ from 9 percent in 1984 to 19 percent in 2004. At the same time, the __9__ of 17-year-olds who read daily dropped from 31 to 22.This slow but steady retreat from books has not yet taken a toll on reading ability. Scores for the nation’s youth have __10__ constant over the past two decades (with an encouraging upswing among 9-year-olds). But given the strong apparent correlation between pleasure reading and reading skills, this means poorly for the future.A.percent B. remained C. rose D. rates E. percentageF.counted G. relieved H. present I. believing J. releasedK. forcing L.Improve M.styles N.building O.attributes

答案查题题库