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The mason ______ I didn't do this exercise is I didn't know how to do it.
A．why...because
B．why...that
C．for...that
D．that...because
答案
更多“The mason ______ I didn't do this exercise is I didn't know how to do it.A．why...becauseB．”相关的问题
第2题
The passage indicates that, for Mason, political activities were ______.
A．undertaken only when absolutely necessary
B．a fundamental and lifelong preoccupation
C．something he successfully avoided throughout his life
D．something to which he always wished to devote more time and attention
第3题
Mason's relation to the Federal Bill of Rights was one of ______. ()
A．significant but indirect influence
B．principal authorship
C．sole authorship
D．distant and essentially unimportant influence
第4题
The author indicated that Mason's brilliant leadership ability ______. ()
A．was exercised throughout his life
B．had been recognized only by the generations that followed him
C．was less important historically than his brilliance as lawyer
D．emerged powerfully, but for a brief time only
第5题
A．Only women were successful as water carriers.
B．Colonial women were particularly healthy and strong.
C．They were needed to make battle uniforms.
D．The army desperately needed combat soldiers.
第6题
Meanwhile, families are less close than they used to be. More and more American mothers【45】away from home. The break-up of the family occurs when the parents【46】. A lot of children in the USA. live part of their young lives with only one parent. Broken families usually result【47】problems for children and parents alike. Children blame themselves when their parents separate. They grow up feeling【48】as they are moved【49】between parents. Usually one parent is responsible for raising the children. These single parents must care for the children's emotional and psychological【50】while also supporting them financially. This is very demanding and【51】very little time for the parent's own personal【52】. Single parents often marry other single parents. In this type of family, unrelated children are【53】to develop brother or sister relationship. The situations of many American families today are not good. However, recent signs【54】that things are getting better. The divorce rate is【55】. The rate of childbirth is rising. Perhaps Americans have learned how important families are.
(66)
A．tended
B．wanted
C．seemed
D．extended
第7题
According to the passage, most people said they didn't like instant coffee because ______.
A．it had many disadvantages
B．they didn't want to be lazy housewives and poor planners
C．they didn't like its taste
D．it was spoiled by too much advertising
第8题
Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)
At current online-ad rates, it is almost impossible for web publishers that create their own content to make money—just ask any of the two dozen, from Z.com to eCountries that have gone bust in the past month alone. The mason for the bloodbath is simple: advertisers are not willing m pay enough for web ads to support the cost of displaying them.
To see why, consider a credit-card firm that wants to find customers online. Say it runs a campaign to display its banner ad to 2 million viewers. Using industry averages, one out of every 200 viewers can be expected to click on the ad: one out of every 100 of those will actually sign up for a credit card. Thus, the campaign would yield 100 new customers. Offline, the firm pays about $150 for each customer it acquires, through anything from direct mail to television ads. Using the same rate, it would therefore be willing to pay $15,000 for those 2 million online-ad views, or a cost-per-thousand-views (CPM) rate of $7.50.
Now consider the economics of the website that is running those ads. It probably does not have its own ad sales team, so it is getting those credit-card ads from an advertising network such as DoubleClick. The network takes half the revenues, leaving the site with a CPM of $3.75. Imagine that the site is very successful, say among the top few hundred on the web. If so, it may be able to generate 10m page views 'a month. At $3.75 per thousand views, that means revenue of $37,500 a month. Take out hardware, software and bandwidth costs, and enough might be left to support two employees or so.
This grim picture can be improved by selling more than one ad per page, but such clutter often comes at the cost of a lower rate of "click-throughs" and, eventually, even lower CPMs. The site can try to charge higher CPMs by providing more information about viewer demographics, to help advertisers target their ads, or by claiming that it has a sign that may justify a fee for brand-building advertisers. But advertisers are skeptical.
The biggest web portals get their content almost for free—a mixture of material from other-sites and content created by viewers—and attract so much traffic that they can support huge organizations on low CPMs. But for most smaller websites, there is no way out. Those that cannot find revenue sources beyond advertising will either go bust or be forced to admit that their site is a non-profit enterprise. If truth-in-advertising rules were enforced, most dotcoms would be dotorgs.
In nowadays, earning money from the web is rather______.
A．difficult
B．unimaginative
C．easy
D．impossible
第9题
That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other animals) in a new fishery is reduced on average by 80% within 15 years of the start of exploitation. In some long-fished areas, it has halved again since then.
Dr. Worm acknowledges that these figures are conservative. One mason for this is that fishing technology has improved. Today's vessels can find their prey using satellites and sonar, which were not available 50 years ago. That means a higher proportion of what is in the sea is being caught, so the real difference between present and past is likely to be worse than the one recorded by changes in catch sizes. In the early days, too, longlines would have been more saturated with fish. Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past. Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around now.
Dr. Myers and Dr. Worm argue that their work gives a correct baseline, which future management efforts must take into account. They believe the data support an idea current among marine biologists, that of the "shifting baseline". The notion is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past. That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels. Most fisheries are well below that, which is a bad way to do business.
The extinction of large prehistoric animals is noted to suggest that ______.
A．large animals were vulnerable to the changing environment
B．small species survived as large animals disappeared
C．large sea animals may face the same threat today
D．slow-growing fish outlive fast-growing ones
第10题
______ I'd have told you.
A．If I would have known it
B．If I had have known it
C．Had I known it
D．Should I known it
