【简答题】已知a 2 =1,|a|=-a,求 4-4a 的值.
【简答题】已知 ,求A 2 ,A 4 ,A 100 .
【多选题】根据复旦大学中国保险科技实验室对我国汽车消费者的调查,下列哪些情况是我国消费者非常担心发生的?
C.
自动驾驶汽车在无人乘坐时自己从一个地方行驶到另一个地方
【简答题】已知 (1)若a=4,求 (2)若 ,求a的取值范围.
【简答题】①已知:r=4分米,求:C? ②已知:C=18.84米,求:S?
【简答题】The last half of the nineth century ________ the steady improvement in the means of travel. A) has witnessed B) was witnessed C) witnessed D) is witnessed
【简答题】已知 ,求A 2 ,A 4 ,A 100 .