题目

下列关于生命活动调节的叙述，正确的是 A．激素和酶都具有高效性，在非细胞条件下也能发挥作用 B．激素和抗体都具有特异性，只能作用于某一特定的靶细胞 C．血液中未参与免疫反应的淋巴细胞都是记忆细胞 D．神经细胞上神经冲动的传导都以局部电流为前导 答案：D阅读理解。     根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。     If you have ever been in a school play or even made believe you were a doctor, detective, or a space traveler, you know the enjoyment that acting brings. Almost all of us have the wish to play the part of someone-or something-else.   1        In the ancient world, acting was often associated with religious ceremonies and other special occasions. As far back as 2200 B.C. trained Chinese actors performed ceremonial dances in costume and makeup at harvest festivals.   2  To the dance was gradually added pantomime-the imitation of movements and gestures-as well as the wearing of masks, the singing of chants, and finally the use of dialogue.     While acting was coming into its own in the ancient Chinese classical theatre, it was doing the same in the western world, in Greece. From about 500 B.C. on, acting became a highly specialized art in Greece. Greek actors, however, still wore masks, and their motions were largely fixed by custom.   3        Modern acting, by contrast, gives the individual actor great opportunity to develop his or her personal talents for serious, comic, or musical drama. The names, faces, and styles of famous movie actors are known worldwide.   4     A special form of acting takes place in radio drama, which was highly popular before television. In radio drama the actors face an unique challenge. They are unseen by their audience. So they must rely on voice alone to make their characters real to the listeners.       5  Only forty percent of Broadway actors are employed, most of them for only part of the year. Those who become stars need not only talent, but determination. They must not be easily discouraged. Otherwise, they might give up before the opportunity for stardom presents itself.A. The origins of acting are in the act of remembering.B. Drama in Greece began with festivals honoring Dionysus.C. It is believed that this was the first step in the development of acting.D. Historical records indicate that this desire is as old as civilization itself. E. Acting is not, as many people think, a quick, easy road to fame and riches.F. Broadway and television provide other stages on which actors can display their talent.G. Consequently, they had little opportunity to demonstrate their individual personalities.