下列不属于高温作业的是()。
A.高温强辐射
B.高温高湿
C.露天
参考答案:C
There is no doubt that he is a good professor__________he is doing fine.
A.but
B.because
C.so
D.yet
多项式2x2﹣3x+5与﹣4x2+3x+5的差是[ ]
A.﹣2x2+10
B.6x2﹣6x
C.6x2+10
D.﹣2x2﹣6x