单选题The Pacific island attracts shoals of tourists with its rich ______of folk arts.

单选题As my fine professor of economics Lowell Harriss used to tell us, economics is the study of the allocation of scarce goods and services. What could be scarcer or more precious than love? It is rare, hard to come by and often fragile. My primary life study has been about love. Second comes economics, so here, in the form of a few rules, is a little amalgam (统一体) of the two fields: the economics of love. In general, and with rare exceptions, the returns in love situations are roughly proportional to the amount of time and devotion invested. The amount of love you get from an investment in love is correlated, if only roughly, to the amount of yourself you invest in the relationship. If you invest caring, patience and unselfishness, you get those things back. High-quality bonds consistently yield more return than junk, and so it is with high-quality love. As for the returns on bonds, I know that my comment will come as a surprise to people who have been brainwashed into thinking that junk bonds are free money. They aren"t. The data from bond research, W. Braddock Hickman, shows that junk debt outperforms high quality only in rare situations, because of the default risk. In love, the data is even clearer. Stay with high-quality human beings. And once you find that you are in a junk relationship, sell immediately. Junk situations can look appealing and seductive, but junk is junk. Be wary of it unless you control the market. In every long-term romantic situation, returns are greater when there is a monopoly. If you have to share your love with others, if you have to compete even after a brief while with others, forget the whole thing. You want to have monopoly bonds with your long-term lover. At least most situations work out better this way. The returns on your investment should at least equal the cost of the investment. If you are getting less back than you put in over a considerable period of time, back off. To coin a phrase: Fall in love in haste, repent at leisure.

单选题______ indicate that our theory is wrong. A) The datum B) The datums C) The datas D) The data

单选题 The idea of a fish being able to generate electricity strong enough to light lamp bulbs—or even to run a small electric motor—is almost unbelievable, but several kinds of fish are able to do this. Even more strangely, this curious power has been acquired in different ways by fish belonging to very different families. Perhaps the best known are the electric rays, or torpedoes (电鱼), of which several kinds live in warm seas. They posses on each side of the head, behind the eyes, a large organ consisting of a number of hexagonal shaped cells rather like a honeycomb. The cells are filled with a jelly-like substance, and contain a series of fiat electric plates. One side, the negative side, of each plate, is supplied with very fine nerves, connected with a main nerve coming from a special part of the brain. Current passes from the upper, positive side of the organ downwards to the negative, lower side. Generally it is necessary to touch the fish in two places, completing the circuit, in order to receive a shock. The strength of this shock depends on the size of the fish, but newly born ones only about 5 centimeters across can be made to light the bulb of a pocket flashlight for a few moments, while a fully grown torpedo gives a shock capable of knocking a man down, and, if suitable wires are connected, will operate a small electric motor for several minutes. Another famous example is the electric eel. This fish gives an even more powerful shock. The system is different from that of the torpedo in that the electric plates run longitudinally (纵 向) and are supplied with nerves from the spinal (脊骨) cord. Consequently, the current passes along the fish from head to tail. The electric or gans of these fish are really altered muscles and like all muscles are apt (likely)to tire, so they are not able to produce electricity for very long. The power of producing electricity may serve these fish both for defence and attack.

单选题It was reported yesterday that three teenagers had been______the bank robbery.

单选题The sentence "If only the rest of his expenses were as easy to quantify." (Lines 2-3, Paragraph 1) implies that ______.

单选题We are sometimes __________ of selfishness in our lives, though we are mostly generous in personality.

单选题______ , we'll go out to have a picnic.

单选题The slogan on the poster for Enduring Love indicates that

单选题A. neitherB. heightC. eitherD. neighbour

单选题The adjustment by retarding growth and arresting vital functions during winter may result in the leaf fall of middle latitude deciduous trees.

单选题The merit of a sales tax is that it decreases government reliance on income taxes.

单选题Mark went to the neighborhood meeting after work. The area's city councilwoman (女议员) was leading a discussion about how the quality of life was decreasing. The neighborhood faced many problems. People were supposed to suggest solutions to the councilwoman. It was too much for Mark. "The problems are too big," he thought. He turned to the man next to him and said, "I think this is a waste of my time. Nothing I could do would make a difference here. " On his way back, Mark saw a woman carrying a grocery bag and baby. She was trying to unlock her car, but she didn't have a free hand. As Mark got closer, her other child, a little boy, suddenly darted into the street. The woman tried to reach for him, but as she moved, her bag shifted and groceries started to fall out. Mark ran to take the boy's arm and led him back to his mother. Then he picked up the groceries while the woman smiled in relief. "Thanks!" she said. "You've got great timing (适时)!" "Just being neighborly (友好的)," Mark said. As he rode home, he glanced at the walls of the bus passed by. On one of them was "Small acts of kindness add up. " Mark smiled and thought, "Maybe that's a good place to start. /

单选题The driver was ______ of running away from the scene of the car accident.

单选题Mary was tramping the woods ______. A) barefooted B) barefeeted C) barefootedly D) barefoot