单选题Coming at the Town Hail, the Queen was welcomed by the Mayor.

单选题The house was situated on a hill over the village.

单选题Millions of tons of water are ______ by a complex system of dykes.

单选题According to the psychoanalyst Sigmund Freud, wisdom comes from the ______ of maturity.

单选题The general manager demanded the job {{U}}will be completed{{/U}} before the National Day.

单选题As used throughout the passage, the term "common" is closest in meaning to which of the following?

单选题Such legal Uentities/U provide the means for international cooperation and support of macroprojects related to the moon and mars that encourage global private sector participation.

单选题Bob believes that the invasion of the marketplace into the university is undermining fundamental academic values, and that we must act now to halt this decline.

单选题Since writing home to theft parents for money, they had lived ______ hope.

单选题The government has hardly taken measures to crack down on these crimes when new ones occurred.

单选题We might say that the earliest tools were a means of extending the human being own bodily powers.

单选题I was______busy looking for the recruitement ads to pay attention to the other news in the newspaper. A．very B．too C．much D．so

单选题I knew nothing of the motives behind his recent move, and I don"t know either the person to put him up to the action.

单选题Professor White, my respected tutor, frequently reminds me to______myself of every chance to improve my English.

单选题I was discharged in 1947 and, motivated by intellectual curiosity, decided upon a career in medical research at a time when such a choice was not ______.

单选题I would recommend this inn highly on account of its wonderful location.

单选题In this passage RDAs refers to ______.

单选题Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer's piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright. Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they've apparently learned is when to (98) . Is there an adaptive value to (99) intelligence? That's the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we've left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I've ever met. Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in? (110) the results are inconclusive.

单选题 The blue of the sea is caused by the scattering of sunlight by tiny particles suspended in the water. Blue light, being of short wavelength, is scattered more efficiently than light of longer wavelengths. Although waters of the open ocean are commonly some shade of blue, green water is commonly seen near coasts, especially in tropical or subtropical regions. This is caused by yellow pigments being mixed with blue water. Phytoplankton are one source of the yellow pigment. Other microscopic plants may color the water brown or brownish-red. Near the shore, silt or sediment in suspension can give water a brownish hue. Outflow of large rivers can often be observed many miles offshore by the coloration of suspended soil particles. Marine phytoplankton (Greek for "plant wanderers") are microscopic single-celled plants that include diatoms, dinoflagellates, coccolithophorids, green algae, and blue-green algae, among others. The growth of these organisms, which photosynthesize light, depends on a delicate balance of nutrient enrichment via vertical mixing, which is often limited by the availability of nitrogen and light. Diatoms are one-celled plants with patterned glass coverings. Each glass, or silicon dioxide box, is ornamented with species-specific designs, pits, and perforations making them popular with microscopists and, more recently, electron scanning microscopists.

单选题The sense of mistrust is {{U}}compounded{{/U}} by smaller annoyances that leave the families feeling as though no one in authority cares about them.