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已知ab=﹣5,a﹣b=6,则a2+b2=(  )

A:13

B:19

C:26

D:37

上一题 下一题 0.0难度 选择题 更新时间:2019-05-20 11:09:13

答案(点此获取答案解析)

C

同类题1

如图所示,质量为m的小球A、B分别固定在轻杆的中点和端点,当杆在光滑水平面上绕O点匀速转动时,求杆OA段与AB段对球的拉力之比。

同类题2

根据短文内容的理解,选择正确答案。

B

    A young man went to a car shop. He was wearing rubber boots(橡胶靴子) and a dirty jacket. He needed a haircut(理发) very much. The young man looked at an expensive car carefully and then asked the shop owner(店主), "How much is this car?" "Nine thousand two hundred and eighteen," the owner answered. "I want sixteen of them," the young man said. The shop owner smiled coldly. He showed the door to the young man.

    In another shop on the other side of the street the business was done(生意做成了). The young man took money out of his pocket and paid for the cars. He said the cars were for himself and his friends were. Each of them wanted to get one. He said that he and his friends were working on a fishing-boat. "We have got much money this season," the young man said, "and we want to buy cars."

同类题3

对于常温下pH=3的乙酸溶液,下列说法正确的是(  )

同类题4

i是虚数单位,复数7-i3+i=( )

同类题5


He was so fat that he could only just____ the door.
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