单选题A laser beam is used to ______even the hardest substance.

单选题The sizzling streams of sunlight were just beautifully glimmering down on the crisp green schoolyard. Such a wonderful day that was. Nothing could have ruined it. Little Jimmy, since it was such a wonderful day, decided to go to the corner store and buy himself a little treat. As Jimmy started walking over to the store, clouds flocked over the dazzling sun and the sudden pitch dark meant no trouble. On the other side of the road were three white boys from Jimmy's same school. Upon recognizing Jimmy, the boys ran over the street to where he was."Hey Negro, what's up?" one of the white boys said."Did your mamma pack you enough to eat today?" another hooted."Just leave me alone," little Jimmy said."Oh no, Jimmy's really getting pist off! ?" the first boy retaliated."Just shove off and let me be," Jimmy answered. It is like this everyday, everywhere, and every time, people suffer discrimination. All because they have differences amongst each other. Different beliefs, different cultures, different skin colors, all of these act like building blocks to help construct what we know as Racism. Racism has become one of the many burdens amongst multi-cultural worlds like Canada and the States. Racism is a part of each and every one of us. No doubt, we are all racist, but the term racism has been used too loosely. Racism has been mutated to such an extent that it could be a reason for war, a symbol of terrorism, and even an excuse for neglecting. Is that all there is to it? No, actually it is just the beginning. Racism is just like warfare in which there is no shelter and nobody is neutral. Nobody is exempt from this demon. He has haunted us with a bitter curse. On one occasion I remember, nobody would play with me at school. I would walk around by myself and ask people if we could play together. Everywhere that I went, like the process of induction, everyone would avoid me. Like two inducted poles with the same polarity, they would just shimmer off into the distance and continue to do whatever they're doing. Because of racial differences, they neglect me. People are afraid of the unknown, and it is this difference amongst people that spread rumors and distrust amongst people. Corrupting our thoughts and reasons, we get accustomed to thinking differences are omens. Amongst smaller kids, there is no difficulty in getting them to all play together. Their thoughts are not totally corrupted as others. Probably the demon has no time to bother with smaller children.

单选题As ordinary people, scientists are by no means more honest or ______ than other people, but as scientists, they attach special value to honesty while they are in their working sphere. A. ethical B. ethnic C. aesthetic D. esthetic

单选题The issue of the movie is displayed around ______.

单选题To save money for my education, mother often took on more work than______ for her.

单选题He (looked) (a little bit) nervous, (that) could be seen from his (facial expression).

单选题At Wembly, the home of football, countless thousands of people spend Sunday morning amongst the ______ selling everything from shoes to model trains.

单选题If you call the 911 emergency number, they will ______ firemen, policemen, and paramedics immediately.

单选题A small detachment of soldiers ______ into the enemy's territory.

单选题The word "prospective" in the first sentence of the passage means ______.

单选题"The effect of this medicine______by midnight," the doctor told Emma, "You had better not try to read tonight. "(北京大学2005年试题)

单选题The author's attitude towards the "hacker" phenomenon can be described as______.

单选题Grant was one of a body of men who were self-reliant ______, who cared hardly anything for the past but had a sharp eye for the future.

单选题There was ______ rain and snow last winter. So we have a good harvest this summer.

单选题The phrase "a cornucopia of" (paragraph 1) means ______.

单选题Which of the following conditions does the passage suggest is a possible cause for the failure of a lobster to develop a crusher claw?

单选题Initial reports were that multiple waves of warplanes bombed central Baghdad, hitting oil refineries and the airport.