What does the word "emit" (L4, P1) probably mean?
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1 .The kind of planet, which has _____, might be able to support life.
A a moderate temperature B on the edge of our solar system C affected by dust D the limitation of earth-based telescopes E their small size and no light emission F does not exist
2 .A telescope capable of finding life on other planets would have to far enough from the center of our solar system and be not ____.
A a moderate temperature B on the edge of our solar system C affected by dust D the limitation of earth-based telescopes E their small size and no light emission F does not exist
3 .At present, the telescope that is capable of detecting life _____.
A a moderate temperature B on the edge of our solar system C affected by dust D the limitation of earth-based telescopes E their small size and no light emission F does not exist
4 .What is the passage mainly about?
A The relationship between bees' individual motion and the hive's overall success. B The process of a scientific experiment about the robot-roaches and the real ones. C How millions of brain cells give rise to thoughts. D How to invent a robot that human beings would accept.
5 .The aim of the experiment carried out in Belgium is ____.
A to make the robots be cousins with the biological roaches. B to get the robotic and biological roaches to cooperate on common task. C to figure out how individual's behavior leads to a collective decision. D to make the robots look and smell like the real ones.
7 .What did the real cockroaches do when the robot-roaches made an inappropriate decision?
A Some of them headed toward the dark areas. B Many followed the collective to a lighter shelter. C All of them followed the collective to a lighter shelter. D Most of them stayed still.
8 .What can we learn about the feature of the robot-roaches?
A They look much like the real roaches. B The programming of them will never be overridden by the real roaches. C They can behave like the natural cockroaches. D They can emit the same molecules that roaches use to identify their kin.
9 .As predators, ants_____.
A prey on small as well as large animals. B collect nutritious food from the soil C collect food as decomposers. D prey on species much higher up the food chain.
10 .Dir Sanders' study centered on how ants_____.
A can manage to thrive in huge numbers. B defend their resources and territory against other predators. C attack those invading animals for survival. D produce such a big impact on the environment.
