The Harvard School of Public Health experts found that there was ______ relation between concentrations of chemical deposits in blood and immunity.
A．no direct
B．an unilateral
C．a direct
D．an unpredictable

未分类题Why are cinemas moving rapidly into digital screens according to the author?A．Because digital screens can bring owners of cinemas much more profits.B．Because owners of cinemas are in favor of new high technology devices.C．Because digital screens can give film viewers a better picture quality.D．Because more and more 3D films like Avatar are released in recent years.

未分类题What makes the digital screens possible, according to the passage?A．Digital light processing technology.B．Use of millions of tiny mirrors on the chip.C．The chip capable of moving thousands of times per second.D．The American movie entitled Avatar made in Hollywood.

未分类题【T10】A. WATCH B. INFORMATION C. WITH A. ASSOCIATED【T7】______ A 22-MINUTE REDUCTION IN THEIR LIFE EXPECTANCY B. LIVED AN AVERAGE 4. 8 YEARS LESS THAN THOSE WHO DIDN'T【T8】______ ANY TELEVISION C. WHEN THEY COLLECTED TV VIEWING【T9】______ SITTING IN FRONT OF THE TELEVISION MAY BE RELAXING, BUT SPENDING TOO MUCH TIME IN FRONT OF THE TV MAY TAKE YEARS OFF YOUR LIFE. THAT'S WHAT AUSTRALIAN RESEARCHERS FOUND,【T10】______ FROM MORE THAN 11, 000 PEOPLE OLDER THAN 25 YEARS. THE STUDY FOUND THAT PEOPLE WHO WATCHED AN AVERAGE SIX HOURS OF TV A DAY【T11】______ . ALSO, EVERY HOUR OF TV THAT PARTICIPANTS WATCHED AFTER AGE 25 WAS【T12】______ THE MORE TV YOU WATCH, THE LESS PHYSICALLY ACTIVE YOU ARE. AND THE LESS EXERCISE YOU GET, THE MORE LIKELY YOU ARE TO DEVELOP DISEASES SUCH AS DIABETES OR HEART PROBLEMS.

未分类题The mayor has spent a handsome amount of time in his last term working to bring down the tax rate.A．considerableB．moderateC．sufficientD．plenty

未分类题【T16】A. BETWEEN B. IMITATE C. ACCELERATE D. OTHERWISE PHRASES: A. ENABLING THE BIRD TO【T13】______ B. IT【T14】______ COULD C. WOULD BE DIFFICULT TO【T15】______ D. FROM【T16】______ ITS FEATHERS THE EMPEROR PENGUIN TRAPS AIR IN ITS FEATHERS. NOT ONLY DOES THIS INSULATE THE BIRD AGAINST EXTREME COLD BUT IT ALSO ENABLES IT TO MOVE TWO OR THREE TIMES FASTER THAN【T17】______ HOW? MARINE BIOLOGISTS HAVE SUGGESTED THAT IT DOES SO BY RELEASING TINY AIR BUBBLES【T18】______ . AS THESE BUBBLES ARE RELEASED, THEY REDUCE FRICTION ON THE SURFACE OF THE PENGUIN'S WINGS,【T19】______ . INTERESTINGLY, ENGINEERS HAVE BEEN STUDYING WAYS TO MAKE SHIPS GO FASTER BY USING BUBBLES TO REDUCE FRICTION AGAINST THEIR HULLS(船身). HOWEVER, RESEARCHERS ACKNOWLEDGE THAT FURTHER INVESTIGATION IS CHALLENGING BECAUSE 'THE COMPLEXITY OF PENGUIN'S WINGS【T20】______ '.