若一个几何体的主视图、左视图、俯视图分别是三角形、三角形、圆,则这个几何体可能是( ).
A.球 B.圆柱C.圆锥 D.棱锥
参考答案:C
I was ________ happy on hearing the good news that I couldn't even fall asleep. [ ]
A. too
B. so
C. such
D. much
DLX流水线寄存器的作用是什么?