【名词&注释】
临床表现(clinical manifestation)、重要内容(important content)、预备立宪(preparation for constitutionalism)、中心环节(central link)、阿米巴肝脓肿(amebic liver abscess)、阶级矛盾(class contradiction)、马克思主义理论建设(building of marxist theory)、阿米巴性肝脓肿(amebic liver abscess)、化学势梯度(chemical potential gradient)、阿米巴原虫
[单选题]植物细胞中质子泵利用ATP水解释放的能量，逆电化学势梯度(chemical potential gradient)跨膜转运H+，这一过程称为
A. 初级主动运输
B. 次级主动运输
C. 同向共运输
D. 反向共运输
There's no question that the big are getting bigger and more powerful. Multinational corporations accounted for less than 20% of international trade in 1982. Today the figure is more than 25% and growing rapidly. International affiliates account for afastgrowing segment of production in economies that open up and welcome foreign investment. In Argentina, for instance, after the reforms of the early 1990s, multinationals went from 43% to almost 70% of the industrial production of the 200 largest firms. This phenomenon has created serious concerns over the role of smaller economic firms, of national businessmen and over the ultimate stability of the world economy. I believe that the most important forces behind the massive M&A wave are thesame that underlie the globalization process: falling transportation and communication costs, lower trade and investment barriers and enlarged markets that require enlarged operations capable of meeting customers' demands. All these are beneficial, not detrimental, to consumers. As productivity grows, the world's wealth increases. Examples of benefits or costs of the current concentration wave are scanty. Yet it is hard to imagine that the merger of a few oil firms today could recreate the same threats to competition that were feared nearly a century ago in the U.S., when the Standard Oil trust was broken up. The mergers of telecom companies, such as World Com, hardly seem to bring higher prices for consumers or a reduction in the pace of technical progress. On the contrary, the price of communications is coming down fast. In cars, too, concentration is increasing — witness Daimler and Chrysler, Renault and Nissan — but it does not appear that consumers are being hurt. Yet the fact remains that the merger movement must be watched. A few weeks ago, Alan Greenspan warned against the megamergers in the banking industry. Who is going to supervise, regulate and operate as lender of last resort with the gigantic banks that are being created? Won't multinationals shift production from one place to another when a nation gets too strict about infringements to fair competition? And should one country take upon itself the role of “defending competition" on issues that affect many other nations, as in the U.S. vs. Microsoft case? 第63题：What is the typical trend of businesses today?
