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【判断题】
A cross-sectional data set consists of observations on a variable or several variables over time.A.
正确
B.
错误
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举一反三
【单选题】In early 2004 eight tiny sensors were dropped from a plane near a military base in California. After hit ting the ground, the sensors—also known as smart dust sensors organized themselves into a netwo...
A.
giving troops their protective gear
B.
organizing themselves into a computer network
C.
detecting the movement of military vehicles nearby
D.
operating in remote and dangerous War zones
【单选题】__________sensors are able to detect targets autonomously
A.
Position and movement
B.
Non-cooperative
C.
Exteroceptive sensors
D.
ex-proprioceptive ones (sensors)
【简答题】阅读理解。 Head above Water TUVALU, a tiny country in the Pacific Ocean, has asked for help as it will be swallowed up by the sea. Storms and huge waves are a constant threat and none of Tuvalu's nine litt...
【单选题】In early 2004 eight tiny sensors were dropped from a plane near a military base in California. After hitting the ground, the sensors—also known as smart dust sensors—organized themselves into a networ...
A.
giving troops their protective gear
B.
organizing themselves into a computer network
C.
detecting the movement of military vehicles nearby
D.
operating in remote and dangerous War zones
【单选题】Tiny sensors will be built into the new spaceship so that ______.
A.
the computer brain can feel the smallest pinpricks
B.
the spaceship can have human sensations
C.
the sensors can send signals to the spaceship
D.
the spaceship will be capable of repairing itself
【简答题】如何避免黄花菜中毒？
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