单选题James: ______. Jane: Maybe you should talk to him about it.

单选题Her remarks left me wondering ______she could have changed so suddenly.

单选题Not until the advent of histochemistry could the anatomist see through the microscope which cells carry specific enzymes or {{U}}gauge{{/U}} how active these enzymes are in different cells under various conditions.

单选题______ if he is willing to fit in with the plans of our group.

单选题Kellie: You haven't been around much lately, have you?Marie: ______.Kellie: Oh? Where were you?Marie: Palm. Springs. I've got a cousin there.

单选题Is the theory of evolution in direct ______ with religious teachings, or does it leave room for debate?

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.