○  英语演讲教程:developing the speech text  ○

the photomicrograph on this slide shows ...

the flow-chart on this slide points out...

the circuit diagram on this slide represents~...~

indicating the sources of the content in a

this figure is taken from.., by dr. li.

this diagram is after that of prof. wang with some modification

vii. demanding to show the next slide

may i proceed to the next slide, please?

i think we can move on to the next slide.

let me show you the next slide.

now, we can go on to the next slide.               '

next slide, please.

next, please.

next !

viii. returning to the previous slide

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