练习说明
句子填空 题目要求：阅读文段，从文中挑选原词补全句子，每道题目都有特定的字数要求，以黑体加粗字标示。请把答案填到每题空缺处。
Choose NO MORE THAN ONE WORD from the passage for each answer.
第 1 题
Not too long ago whole colonies of bees suddenly began to die across the globe. In the USA, some species of wild bees have in fact become extinct. Some researchers put the blame squarely on the use of pesticides, although it is doubtful that this is the entire cause.
Some researchers attribute the extinction of certain wild bees in the USA to the use of ______.
第 2 题
For example, consider a rescue worker with a box full of RoboBees — a package weighing less than a kilogram and which could rapidly be transported to the site of a natural disaster, where the bees would search for the heat or exhaled carbon dioxide of survivors. If only three of the robots accomplish their task while the others fail, this is a triumph for the colony as a whole.
A container holding RoboBees, which is under 1kg in weight and can be quickly delivered to a disaster area, allows the devices to look for the ___ or carbon dioxide released by people who have survived.
第 3 题
We have therefore designed the RoboBee with an anatomy that closely mirrors an airborne insect. It has wings powered by actuators - small motors that act like artificial muscles and which are powered by an electric current. Some motors power the wing stroke to keep the RoboBee in the air, while smaller motors control wing motions so it can maneuver more easily.
The RoboBee’s wings are driven by small motors known as ______.
第 4 题
These challenges have motivated us to create the Kilobot system — a series of tiny robots, which are far more basic than the RoboBee in terms of their physical structure and range of movement. However, they can move by vibrating and they can communicate with other nearby Kilobots.
Though much less sophisticated than RoboBee in body design and motion scope, Kilobots achieve locomotion via ____ and interact with adjacent fellows.
第 5 题
For example, we can ask the group to search for an item within an environment, then, once an individual Kilobot finds it, report where it is back to the group. We have also published the Kilobot design online for groups wanting to make their own, in the hope that people will comment on and contribute to the further development of robot design.
After locating a target object, a single Kilobot is required to ______ the object’s position to the rest of the group.
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