We _____ in Harbin next week.[ ]
A. are arriving
B. to arrive
C. arrives
D. arrive
答案:A
倾斜角为45°,在y轴上的截距为-1的直线方程是( )
A.x-y+1=0
B.x-y-1=0
C.x+y-1=0
D.x+y+1=0
TDRU318D每通道最大输出功率为5W。()