根据图示情况填写实验结果:
(1)温度计的读数是______℃;
(2)弹簧测力计的读数是 ______N.
28;4.6
下列计算正确的是[ ]
A.x2y﹣2xy2=﹣x2y
B.2a+3b=5ab
C.﹣3ab﹣3ab=﹣6ab
D.a3+a2=a5
5,12,21,34,53,80,()
A.115
B.117
C.119
D.121