单选题Listening3"GeologyClass"

单选题Consumer Demand and Development of Green Cars The day automakers put the earth at the top of their agenda will go down in history. Reading this book, one gets the sense that day is coming, major automakers—still no paragons of environmentalism—have gotten the message that replacing the dirty internal-combustion engine is an urgent priority. With less than 5 percent of the world's population, Americans produce 14 percent of all global warming carbon-dioxide gas. And car tailpipes pump out more than 30 percent of U. S. air pollution. In his new book, Forward Drive: The Race to Build "Clean" Cars for the Future, environmentalist Jim Motavalli concludes that capitalist competition is leading the way over government mandates to clean up that exhaust. Motavalli chronicles the movement for cleaner cars: the few visionaries and zealots building and driving home-built battery-powered cars; the divided giant automakers working tirelessly to develop clean cars while fighting regulatory efforts to require them; university researchers concluding studies; and the regulators trying to speed their adoption. Forward Drive covers the technological advances of the hybrid and fuel-cell vehicles poised to take over from the internal-combustion engine. In some ways, Motavalli is an unlikely narrator. A self-vowed car nut who stumbled into a job editing E, the Enviromental Magazine, he seems biased on both sides of the issue. But ultimately, that's what makes him best suited to tell this story. Motoavalli's concern for the environment is sincere, and his knowledge of cars is refreshingly accurate. The most interesting passages follow his transformattion from internal-combustion devotee to environmental auto cynic and battery-car zealot to hopeful future-car realist. "It was disconcerting, to say the least, to learn that my hobby of collecting classic cars and my growing concern for the environment didn't necessarily mesh," Motavalli writes. "The car has certainly been good to me, but I'm becomin disenchanted." In the preface, he noted that he set out to write a book critical of the auto industry for teaming up with major oil companies to block the development of clean cars. But when he dug in to do more research, he found a different story. Namely that automakers in Detroit, Japan, and Europe are in a heated race to start selling cars that are more environmentally correct.(A) [■] Unfortunately, Motavalli glosses over issues of consumer demand.(B) [■] He never mentions that today's electric cars and gasoline-electric hybrids cost far more than internal-combustion cars of equal or greater capability.(C) [■] He notes their utter dedication to their electric cars and implies that the rest of the buying public should simply be as enthusiastic, without addressing issues of price or various ways families use their cars.(D) [■] He strongly favors California's mandate that 10 percent of all vehicles sold in the state be zero-emission-vehicle-battery or fuel-cell electrics, not hybrids—even though he writes, "Ultimately, vehicles halfheartedly designed to meet a mandate would fail in the marketplace." And he gives a short shift to the point that clean cars do nothing to ease congestion and sprawl. In a telephone interview, Motavalli concedes that technology is progressing faster than the book deadline allowed him to keep up with. If anything, automakers are working harder to develop hybrid-electrics. And mass-market hybrid-drive systems will likely first show up in the big sport utility vehicles that Motavalli rails against. Nevertheless, he now believes that the automakers with the deepest pockets have the best chance of building better cars for tomorrow. "The new, clean cars will emerge not from a tinkerer's garage, but from the well-funded research labs of the same big auto companies that initially fought their introduction," he says.

单选题Protein digestion begins in the stomach ____ends in the small intestine.

单选题Except for certain microorganisms, _____ need oxygen to survive.

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单选题According to the passage, how are ants guided by trail pheromones?

单选题Georgia O'Keeffe is known for (hers) use (of) organic, abstract (forms) painted in clear, (strong) colors.

单选题A merger is achieved when a company purchased the property (of other) firms, (thus) absorbing them (into) one corporate structure (that retain) its original identity.

单选题The sounds used in human languages to create meaning consist of small variation in air pressure can be sensed by the ear.

单选题Listen to Track 29. A. He is searching for a synonym for the term. B. He is not sure how much information the students need. C. He is going to briefly address a related topic. D. He is giving the students a writing assignment.

单选题Cement is produced (commercially) by (to heat) a mixture of limestone and clay (in a) large,(slowly rotating) cylindrical furnace.

单选题The most important parameters affecting a rocket’s maximum flight velocity is the relationship between the vehicle’s mass and the amount of propellant it can carry.

单选题The word "vast" in line 10 is closest in meaning to

单选题Listentopartofaconversationbetweenastudentexchangecounselorandastudentwhowillbelivingoverseaswithahostfamily.Nowgetreadytoanswerthequestions.Youmayuseyournotestohelpyouanswer.

单选题1. Which of the following best describes the organization of the talk? A. Reasons to buy property-liability insurance B. Instructions for buying life insurance C. A classification of insurance D. A history of insurance ABCD C [解析] Each kind of insurance protects its policyholder against possible financial loss. Life insurance pays your family a certain sum upon your death. The purpose of life insurance is to provide your family with financial security, an immediate estate that will allow them to maintain the household after you die. Health insurance protects you against large medical expenses. When you pay premiums to your insurance company, you can ensure payment of your medical bills. Another kind, property-liability insurance, is sometimes called casualty insurance because it covers the cost of accidents--like automobile accidents, fire, and theft. If you're like most people, your home is the largest single investment you make in your life. This is why most homeowners have some type of property-liability insurance.1. Which of the following best describes the organization of the talk?The talk is a classification of insurance. The speaker says: Each kind of insurance.,.; Life insurance...; Health insurance...; Another kind, property-liability insurance

单选题The word "detecting" in line 23 is closest in meaning to

单选题Nearly all animals have a good sense of their own bodies, the trait of physical self- awareness. For this reason, animals do not generally bump into things. Horses know how much room they have around them when they move through narrow spaces. A horse can run between two trees or around large rocks in a way that clearly shows the horse's knowledge of its own body size. Animals show self-awareness in how they respond to discomfort. A dog, for example, has no trouble knowing where to scratch itself to kill a flea. Many animals show self-awareness when they recognize their own reflection. While looking at itself in a mirror, an elephant may move its trunk over different parts of its body. A chimpanzee will make faces, look inside its mouth, or stick out its tongue in front of a mirror.

单选题The musical tone of an electric guitar is created not by the resonance of the body of the guitar but by electronically amplification.

单选题.More and 90 percent of the calcium in the human body is in the skeleton.

单选题All of the following words are defined in thepassage EXCEPT