GRE考试

【单选题】Sending a robot into space to gather information is a viable option, but should only be regarded as that--an option.Even the most technologically advanced robots cannot and should not replace manned missions to outer space.Certainly it is cheaper and less dangerous to launch a computer probe that can gather reams of data, but often the information obtained by a machine only serves to produce more questions than it answers. Therefore, the space program should allow manned missions to follow up on those initial information-gathering robotic ventures.
While manned missions are more costly than are unmanned missions, they are also more successful. Robots and astronauts use much of the same equipment in space, but a human is more capable of calibrating those instruments correctly and placing them in appropriate and useful positions.A、computer is often neither as sensitive nor as accurate as a human in managing the same terrain or environmental circumstances. Robots are also not as equipped as humans to solve problems as they arise, and robots often collect data that is not helpful or even desireD、A、human, on the other hand, can make instant decisions about what to explore further and what to ignore.
The passage supplies information to answer which of the following questionsA．What is the cost of launching a computer probe into space
B．What type of information can safely be ignored when exploring outer space
C．How much information can a computer probe gather in outer space
D．What is the next level in space exploration
E．Are unmanned space missions more economical than manned space missions

网考网参考答案：E
网考网解析：
According to the passage, unmanned missions cost less than manned missions, which makes them more economical. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>