如图,病毒甲、乙为两种不同的植物病毒,经重建后形成“杂种病毒丙”,用病毒丙侵染植物细胞,在植物细胞内增殖后产生的新一代病毒是()
A.
B.
C.
D.
参考答案:D
Researchers have been able to translate brain signals into speech using sensors ____ to the surface
of the brain for the first time.[ ]
A. attached
B. to be attached
C. attaching
D. having been attached
如何得到焊接电弧的静特性曲线?