In the 1980s, the amount of money one made appeared to be the only measurement of his or h
A.Y
B.N
C.NG
A.Y
B.N
C.NG
Two people may be working side by side in a factory and doing the same work, but one may be doing it twice as fast as the __2__; or one may be making no mistakes, while the other is making a lot. In some kinds of work, one can solve the problem of speed if one pays by the amount of work to be done and not by the hour: work paid for in this __3__ is called piece-work. But it is not always possible to do this, so it is sometimes useful to pay workers at different rates, which take differences in skill into __4__. This usually means that the younger and therefore less experienced worker gets less than the __5__ and more experienced one, which seems reasonable enough.
(1)、
A:other
B:sight
C:older
D:way
E:account
(2)、
A:other
B:sight
C:older
D:way
E:account
(3)、
A:other
B:sight
C:older
D:way
E:account
(4)、
A:other
B:sight
C:older
D:way
E:account
(5)、
A:other
B:sight
C:older
D:way
E:account
B.To protect the forest resources from being destroyed.
C.To call for stopping using plastic meal-boxes.
D.To awaken people to the environmental problems.
B.His flight took three hours.
C.Mary had a long drive to the airport.
D.Mary had trouble finding the airport.
B.The killing of bacteria.
C.The invention of the refrigerator.
D.The role bacteria play.
Space is a dangerous place, not only because of meteors(流星)【B1】because of rays from the sun and【B2】stars. The atmosphere again acts【B3】our protective blanket on【B4】. Light gets through, and this is essential【B5】plants to make the food which we【B6】. Heat,【B7】, makes our environments tolerable and some ultraviolet(紫外线的) rays penetrate the【B8】. Cosmic(宇宙) rays of various kinds come【B9】the air from outer space, but【B10】quantities of radiation from the sun are screened off.【B11】men leave the atmosphere they are【B12】to this radiation but their spacesuits or the walls of their spacecraft, if they are inside,【B13】prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in【B14】. Doses of radiation are measured in【B15】called "rems(雷姆)". We all【B16】radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The"【B17】"dose of radiation that we receive each year is about two millirems; it【B18】according to where you live, and this is a very rough estimate. Scientists have reason to think【B19】a man can【B20】far more radiation than this without being damaged; the figure of 60 rems has been agreed.
【B1】
A.but also
B.ever so
C.as well
D.or so
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