下列各操作中，不可删除幻灯片的是（）。

A.在幻灯片浏览视图中选定幻灯片，再按Del键

B.在幻灯片视图中选择幻灯片，再按【剪切】按钮

C.在幻灯片视图中选择幻灯片，再单击【编辑】菜单中的【删除幻灯片】命令

D.在幻灯片大纲视图中选中幻灯片，再按【剪切】按钮

One of the methods of introducing foreign genes into a plant is to make use of certain

soil bacteria to infect the plant and transfer several of blue genes to the infected plant

cells, _____ in high rate of plant cell pision.

A．results

B．resulting

C．to result

D．resulted