单选题 There has been a ______ lack of trust between the two governments.

单选题So ______ was the mood of the meeting that an agreement was soon reached.

单选题Farmers often use water buffalo to help them in the ______ fields.

单选题A new kind of radar has been developed for spaceship travelers. A working laboratory model of a new system of radar that makes use of a beam of light is said to be ten thousand times more accurate than the best comparable system of radar that used microwaves. The model has shown that this radar system, known as laser-doppler radar, can measure with absolute precision speeds varying from spaceship orbital injection (进入) velocities (速度) of five miles per second down to virtual stops—speeds of less than one ten thousandth of an inch per second. According to the scientists who are developing this system, such fine measures of velocity are of prime importance in space missions. In a rendezvous (对接) between two spaceships, or in a landing approach by a vehicle onto an orbiting space station, a bump could rip open a ship's skin, or a nudge could knock the station out of its orbit. The light-beam radar, which operates at a frequency of trillions (百万兆) of cycles per second, could easily detect and measure the movement of a vehicle edging up to a satellite space station. A control system using so precise a signal as this would allow a huge vehicle to dock at a space station as lightly as a feather.

单选题Man: I'm going to drop my Information Science class. It means too early in the morning. Woman: Is that really the good reason to drop the class, Tony? Question: What does the woman mean? A. Tony should continue taking the course. B. She approves of Tony's decision. C. Tony can choose another science course. D. She can't meet Tony so early in the morning.

单选题in its 14 years of ______ the European Union has earned the scorn of its citizens and skepticism from the United States. A. endurance B. emergence C. existence D. eminence

单选题At first glance,there hardly seems to be any comparison between Ravenna and Rome,but backin the 5th century ,it was Ravenna that served as capital of the Western Roman Empire. In this city,Roman ruler

单选题Comrade Li Dazhao, ______ librarian of Beijing University, was one of the founders of the Chinese Communist Party. A. sometimes B. sometime C. some time D. some times

单选题______ from his accent (口音), he must be ______ America.

单选题The ______ goal of the book is to help bridge the gap between research and teaching, particularly between researchers and teachers.

单选题Here is a paper ______ for you to dry your hands.

单选题It can be inferred from the article that the majority of tropical forests ______.

单选题The three points of view that indicate the relations of individuals are ______.

单选题The company has consistently denied responsibility, but it agreed to the settlement to avoid the expense of______.

单选题Costs for regulation of business actually are a hidden tax severely reducing the competitive ness of domestic businesses ______ when they face an increasingly global marketplace.

单选题 ______ me most was that the young boy who had lost both arms in an accident could handle a pen with his feet.

单选题The Saturday Evening Post became symbolic of the reading fare of middle-class America. In 1897 Curtis began to revive （重振） the Post on the proposition that a mans chief interest in life is the fi

单选题 西藏自治区(Tibet Autonomous Region)平均海拔4000米以上，是青藏高原的主体部分，有着“世界屋脊”(the roof of the world)之称。西藏是国际河流分布最多的一个中国省区，雅鲁藏布江(Brahmaputra River)是西藏的第一大河。它全长2057公里，流域面积24万多平方公里。西藏气候具有西北严寒干燥、东南温暖湿润的特点。对于许多未去过西藏旅游的游客来说，西藏的地理位置和气候特点很容易使人产生畏惧心理，其实只要了解西藏的气候特点，能够正确地保护自己，放松心情，就一定会在西藏度过一段美好又难忘的时光。