单选题It will be emphasized that commercial space operations are inherently complex, long-term, capital-hungry, and Uset by/U a variety of risks.

单选题The traffic police stopped three trucks heavily loading with merchandise that looked as grain bags. A. that were loading... like B. loaded with... like C. to load with... for D. loaded with... for

单选题The couple consulted experts and decided to buy the new house on monthly payment plan.

单选题It was a small country house, but it was large ______ urban standards. A. at B. for C. by D. from

单选题 Some pioneering work that began as an attempt to discover ways to increase production efficiency led to the founding of the human relations movement in industry and to the development of motivational skills and tools for managers. In 1927 researchers were involved in determining the {{U}}optimum{{/U}} amount of lighting, temperature, and humidity (with lighting being considered the most important) for the assembly of electronic components at Western Electric. The researchers found that lighting had no consistent effect on production. In fact, production sometimes increased when lighting was reduced to the level of ordinary moonlight! The important part of this experiment began when two Harvard researchers, Elton Mayo and Fritz Roethlisberger, were brought in to investigate these unexpected results further. They found that workers were responding not to the level of lighting but to the fact that they were being observed by the experimenters. This phenomenon came to be known as the Hawthorne effect since the experiments were conducted at the Western Electric Hawthorne Plant. This was the first documented and widely published evidence of the psychological effects on doing work, and {{U}}it{{/U}} led to the first serious effort aimed at examining psychological and social factors in the workplace. Further experiments were continued for five years. Generally, the researchers concluded from their experiments that economic motivation (pay) was not the sole source of productivity and, in some cases, not even the most important source. Through interviews and test results, the researchers focused on the effects of work attitudes, supervision, and the peer group and other social forces, on productivity. Their findings laid the groundwork for modem motivation theory, and the study of human factors on the job, which continues to this day in such common practices as selection and training, establishing favorable work conditions, counseling, and personnel operations. The contributions of this experiment shifted the focus of human motivation from economics to a {{U}}multifaceted{{/U}} approach including psychological and social forces.

单选题The ultimate cause of the Civil War was the bombardment of Fort Sumter.

单选题Digitalis is a drug which is prepared from the seeds and leafs of a plant with the same name and is used as a cardiac stimulant.

单选题A notable lawyer in our city, the man is very busy.

单选题There are now______methods for studying color vision in infants than there once were.

单选题Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes. A. exclude B. excluding C. include D. are included

单选题Nobody can help but be fascinated by the world into which he is taken by the science fiction.

单选题That not-well-planned proposal leaves______room for discussion. A．much B．a big C．a bigger D．a much bigger

单选题The insurance company paid him $5,000 in ______ after his accident.

单选题He is regarded by all as a genius,______the important discovery was made.

单选题"Disguise" in Paragraph 4 is closest in meaning to ______

单选题Humanists argue that human history is marked by a continuous conflict between scientific and technological ingenuity and the demands of the spirit. A. noted by B. conformed with C. certified by D. characterized by

单选题she never ______ to read the news but turned at once to the crossword on the last page.

单选题Go Ahead—Cook with It 别怕—就用它来烹饪 It's grapefruit season. From now through March, the golden orbs are ripe for the picking. And they're not just for breakfast any more. Hanging around on trees all about California: grapefruit—heavy with juice, tartly sweet, beguilingly perfumed．Round and yellow as happy faces or suns, they seem to ripe just as the general populace sinks into its annual round of post-holiday dietary self-chastisement. Coincidence? Perhaps. But we say run with it. Look beyond the obvious salvo of half a grapefruit for breakfast attacked with a jagged spoon and you'll find a marvelous fruit for peeling and eating out of hanD．There's nothing like it for inducing simultaneous feelings of gastronomic piety and delight at recapturing a long-lost pleasure. It's sensual: the aroma of essential oils as they spurt daintily from the pores of the thick skin, the ripping sound of the tenacious segments being pulled apart, the juice dripping down. And it's delicious. But don't stop there. Cook with grapefruit. Use its juice to flavor sauces. Section and scatter it. Bake with it. Candy its peel. Grapefruit is milder and sweeter than lemon, but it can be used in many of the same ways—squeezed on grilled fish, made into a brightly flavored curD．And if you're looking for gorgeous color, red grapefruit offers extra plate appeal. The notion that red grapefruit is sweeter than white or yellow grapefruit is, however, a myth, according to citrus specialists. (The story grew out of a marketing campaign by Texas growers. ) Red grapefruits get their color from lycopene, which has health benefits (its an antioxidant)but does not affect flavor. Sweetness is determined, rather, by the length of time the fruit has been hanging on a tree. A grapefruit picked in December isn't as sweet as one picked in February, so if you have a tree, just pick fruit as needed． If not, ask at your farmers market about the different varieties available, all of which have their fans. California reds include the medium-pink Rio Reds from the Caochella Valley and the Star Ruby from Central Valley (and Texas). Yellow Marsh is a familiar yellow variety and the Duncan, while not usually labeled as such in supermarkets, is a reliable white. For those who don't like the tartness of a true grapefruit, Oro Blanco—the half-grapefruit, half-acidless pummelo—is sweeter and can be used in salads. Our salad of jicama strips, thinly sliced snow peas, fresh pea sprouts (available in Asian markets)and red grapefruit sections has an appealing crunch. Its delicately harmonious flavors are pulled together with a faintly sweet dressing of grapefruit juice, tarragon and mint. The strikingly pink sauce of our baked halibut dish contrasts with the white flesh of the fish for an artful plate—and it's easy to make. Before baking, marinate the halibut in grapefruit juice with garlic and thyme. Sauce it with a reduction of grapefruit juice combined with blood orange juice, which deepens the color and softens the flavor. Then whisk in bits of cold butter for silkiness. A rich crust is a perfect foil for the tangy grapefruit curd filling in our pretty tartlets. Both grapefruit juice and lemon juice are used in the curd to focus the flavor; grapefruits zest enlivens the crust. Garnish them with whipped cream and candied grapefruit peel. For cooking, select heavy fruit, which indicates juiciness. (If you're making a batch of candied peel, however, lighter fruit will indicate more peel.) Before juicing, roll a grapefruit under your hand on the countertop to help extract the most juice. Avoid lumpy fruit, which may be over-ripe. And finally, for those whose resolute January superegos care about such things, here's a reassuring thought: Grapefruit is low in calories (40 to 60 each), high in vitamins C and A, and an excellent source of fiber. It contains no fat, sodium or cholesterol. So peel away.

单选题An international treaty signed several years ago bans trade in plants and animals of endangered species.

单选题The prices quoted above do not include any taxes and levies ______ upon the Personnel by the Government of the project-host country.