单选题The cultures of China and Japan have shared many features, but each has used them according to its national ______. A. personality B. temperament C. interest D. destiny

单选题Jack's______of black music and performers into a mainstream art form contributed in crucial but not often noted ways to desegregation. A. transformation B. assimilation C. deviation D. diversion

单选题My employer______ my request for more money by threatening to dismiss me.

单选题Some people criticize family doctors for ______ too many medicines for minor illnesses. [A] prescribing [B] ordering [C] advising [D] delivering

单选题Stop asking all these personal questions! It is bad manners to be ______.

单选题A man who could ______ such treatment was a man of remarkable physical courage and moral strength.

单选题The board of directors required that Mr. Brown expensive equipment justify buying at a time when the company was practicing strict economy.

单选题Accepting your baby's nature and tuning into it will give him the sense of security that will help him to grow in self-confidence, whatever his______ may be.

单选题Just over a year ago, I foolishly locked up my bicycle outside my office, but forgot to remove the pannier. When I returned the pannier had been stolen. Inside it were about ten of the little red notebooks I take everywhere for jotting down ideas for articles, short stories, TV shows and the like. When I lost my notebooks, I was devastated; all the ideas I'd had over the past two years were contained within their pages. I could remember only a few of them, but had the impression that those I couldn't recall were truly brilliant. Those little books were crammed with the plots of award-winning novels and scripts for radio comedy shows that were only two-thirds as bad as the ones on at the moment. That's not all, though. In my reminiscence, my lost notebooks contained sketches for many innovative and incredible machines. In one book there was a design for a device that could turn sea water into apple cider; in another, plan for an automatic dog; in a third, sketches for a pair of waterproof shoes with television screens built into the toes. Now all of these plans are lost to humanity. I found my notebooks again. It turns out they weren't in the bike pannier at all, but in a bag in my spare room, where I found six months after supposedly losing them. And when I flipped through their pages, ready to run to the patent office in the morning, I discovered they were completely full of rubbish. Discovering the notebooks really shook me up. I had firmly come to believe they were brimming with brilliant, inventive stuff—and yet clearly they weren't. I had deluded myself. After surveying my nonsense, I found that this halo effect always attaches itself to things that seem irretrievably lost. Don't we all have a sneaking feeling that the weather was sunnier, TV shows funnier and cake-shop buns bunnier in the not-very-distant pasty. All this would not matter much except that it is a powerful element in reactionary thought, this belief in a better yesterday. After all, racism often stems from a delusion that things have deteriorated since "they" came. What a boon to society it would be if people could visit the past and see that it wasn't the paradise they imagine but simply the present with different hats. Sadly, time travel is impossible. Until now, that is. Because I've suddenly remembered I left a leather jacket in an Indonesian restaurant a couples of years ago, and I'm absolutely certain that in the inside pocket there was a sketch I'd made.

单选题As the readership was growing more diverse, the penny paper ______.

单选题While hackers with motives make headlines, they represent less than 20% of all net- work security breaches. More common are instances of authorized users accidentally winding up where they should not be and inadvertently deleting or changing data. However, the Internet introduces another concern: some Internet surfers are bound to go where they have no business and, in so doing, threaten to wipe out data to which they should not have access. Before picking a firewall, companies need to adopt security policies. A security policy states who or what is allowed to connect to whom or what. You can group all users by department or classification. The better firewall products let you drag and drop groups in a graphical user interface (GUI) environment to define network security easily. Two methods are most often used together to establish an Internet firewall. They are application and circuit gateways, as well as packet filtering. With application and circuit gateways, all packets are addressed to a user-level application on a gate-way that relays packets between two points. With most application gateways, additional packet-filter machines are required to control and screen traffic between the gateway and the networks. A typical configuration includes two routers. With a bastion host that serves as the application gateway sitting between them. A drawback to application and circuit gateways is that they slow network performance. This is because each packet must be copied and processed at least twice by all the communication layers. Packet-filter gateways, which act as routers between two nets, are less secure than application gateways but more efficient. They are transparent to many protocols and applications, and they require no changes in client applications, no specific application management or installation, and no extra hardware. Using a single, unified packet-filter engine, all net traffic is processed and then for- warded or blocked from a single point of control. However, most packet filters are state- less, understand only low-level protocols, and are difficult to configure and verity. In addition, they lack audit mechanisms. Some packet filters are implemented inside routers, limiting computing power and filtering capabilities. Others are implemented as s9ftware packages that filter the packets in application-layer processes, an inefficient approach that requires multiple data copies, expensive delays and context switches and delivers lower throughput. So what's a network administrator to do? Some vendors are developing firewalls that overcome many of these problems and combine the advantages of application gateways and packet filtering. These efficient, protocol-independent, secure firewall engines are capable of application-level security, user authentication, unified support, and handling of all protocols, auditing and altering. They are transparent to users and to system setup, and include a GUI for simple and flexible system management and configuration.

单选题Although at the______these schools were attended by only a tiny percentage of the population, numbers increased during the 19 th century as waves of immigrants entered.

单选题Australia is struggling to cope with the consequences of a devastating drought. As the world warms up, other countries should pay______ A. heel B. heal C. heed D. head

单选题The teacher's role is not simply to______knowledge to students; he should also set a good example for them.

单选题Under ethical guideline recently adopted by the National Institutes of Health, human genes are to be manipulated only to correct disease for which ______ treatments are unsatisfactory.

单选题We do not mean to be disrespectful when we refuse to follow the advice of our leader.

单选题Compared mathematically to smoking and driving, almost everything else seems relatively risk-free, ______ almost nothing seems worth regulation.

单选题The sheer diversity of tropical plants represents a seemingly ______ source of raw materials, of which only a few have been utilized.