单选题The great San Francisco Earthquake of 1906 demolished great sections of the beautiful city.

单选题I speak, of course, of free men who have a choice, not condemned criminals whose sphere of activities is strictly ______.

单选题Ironically, the party leaders encountered no greater______their efforts to build a progressive party than the______of the progressives already elected to the legislature.

单选题Last year 175 , 000 people flocked to the downtown area for the Thanksgiving Day Parade.

单选题While most experts______the idea that corporations could actually become human beings, most agree that punishing corporations for the crimes they commit will at the very least have a positive effect on the world.

单选题Mr. Smith complained about the ______ air-conditioner he had bought from the company.

单选题Students from a ______ background have an advantage at university. A. previous B. privileged C. private D. principal

单选题TEXT A Australia's frogs are having trouble finding love. Traffic noise and other sounds of city life, such as air conditioners and construction noise, are drowning out the mating calls of male frogs in urban areas, leading to a sharp drop in frog populations. But, in the first study of its kind, Parris, a scientist at the University of Melbourne has found that some frogs have figured out a way to compensate for human interference in their love lives. A male southern brown tree frog sends out a mating call when he's looking for a date. It is music to the ears of a female southern brown tree frog. But, add the sounds of nearby traffic and the message just is not going out. Parris spent seven years studying frogs around Melbourne. She says some frogs have come up with an interesting strategy for making themselves heard. "We found that it's changing the pitch of its call, so going higher up, up the frequency spectrum, being higher and squeakier, further away from the traffic noise and this increases the distance over which it can be for heard," Parris said. The old call is lower in pitch. The new one is higher in pitch. Now, that may sound like a pretty simple solution. But, changing their calls to cope with a noisy environment is actually quite extraordinary for frogs. And while the males have figured out how to make themselves heard above the noise, Parris says it may not be what the females are looking for. "When females have a choice between two males calling, they tend to select the one that calls at a lower frequency because, in frogs, the frequency of a call is related to body size. So, the bigger frogs tend to call lower," she explained. "And so they also tend to be the older frogs, the guys perhaps with more experience, they know what they're doing and the women are attracted to those. " Frog populations in Melbourne have dropped considerably since Parris began her research, but it is not just because of noise. Much of Australia has been locked in a 10-year drought, leaving frogs fewer and fewer ponds to go looking for that special someone.

单选题As my father is not ______ with the language, he has asked me to assume the role of private secretary and meet you on his behalf.

单选题Seeing the wreck for the first time, under the great arc of a sunny sky on that level shore, I was initially impressed by its remoteness. Here was the focus of those weeks of discussion, of seemingly endless careful planning: a slightly projecting, elongated outline. The warmth of the day meant that many holiday-makers were about, and our equipment rapidly attracted them to the site, unmistakable with its brilliant orange marker, each attached to a steel post. These posts marked off the four corners of our working area, and were linked by a rope to keep it clear of curious sightseers. Many structural features of the wreck which would normally have been visible were obscured by the sand, which was not only right up to but even above the upper gun deck. We went to work immediately when the first low tide made a start possible, and set up our basic survey line running down the middle of the wreck from bow to stern. As we set about measuring the sides of the ship in their relation to survey line, the "Amsterdam" emerged as a vessel of substance, and more so when the members of the team had scoured her aged timbers free from mussel shells and seaweed. All this activity attracted an increasing number of sightseers, whose interest was natural and welcome, since the more people who were moved to understand what we were about, the better it was for archaeology in general and for the future preservation of the " Amsterdam" in particular. However, there were also predatory souvenir hunters who were most disappointed by our merely taking elaborate measurements, with no apparent intention of digging up more objects.

单选题Testing new-model plane is a ______ job, but he decided to devote himself to it.

单选题Many political problems are so complicated that the layman cannot see the wood ______. the trees.

单选题Passage 2 Full-time faculty and staff on the University payroll, when applying for an annual permit, may authorize payment of their parking fees by payroll deduction. The first deduction will include the regular monthly deduction of $15.00 plus a one-time deduction to cover all parking charges accruing prior to the first deduction period.

单选题As to terms of payment, we usually require a confirmed and irrevocable L/C ______ by draft at sight.

单选题We expect Mr. Smith will ______ Class One when Miss White retires.

单选题You should ______ to one or more weekly magazines such as Time, or People.

单选题When squashed the stem and leaves of the jewelweed exude a juice that will soothe some skin irritations.

单选题Among the first to come and live in North America______, who later prospered mainly in New England.

单选题Uniform acceleration occurs ______ the rate of change remains the same over successive and equal intervals of time.

单选题Texas, the second largest state of America, is ______ in natural resources.