已知△ABC的三边长分别为a2+b2,2ab,a2-b2(a>b>0),则此三角形的形状为 [ ]
A.锐角三角形
B.钝角三角形
C.直角三角形
D.不能确定
答案:C
根据首字母和句子意思补全单词。
1. I should do my homework tonight i________ of watching TV.
2. He decided to go there, no one could s________ him.
3. Smoking is bad for our health, so we should make some posters a________ smoking.
4. He doesn't have much m________, he is very poor.
5. The giant tortoise lives longest of all animals, i________ humans.
下列应执行非普工业电价是()
A、商场电梯
B、315kVA以下的工业用电
C、基建施工
D、银行用电