What is a central idea of "The Ornithopter"? Select the two correct answers.

A Artists should make beautiful paintings instead of weapons of war.

B Leonardo da Vinci was a creative genius.

C The duke's plan for the ornithopter conflicted with that of da Vinci's.

D Leonardo da Vinci's ideas about flight were ahead of their time.

Based on its elements, this text teaches readers how to

Skill check questions rearrange the paragraphs below into the correct sequence. that's because engineers on the ultraclean project have invented a self-cleaning, antibacterial metal surface that repels water with an intricate layer of laser-engraved valleys. when it rains, the lotus does not become damp; the water simply trickles off in fat droplets, taking any bugs and dirt with it. the drudgery may not be around much longer, however, if a team of italian scientists has anything to do with it “it's simply an amazing plant,” concluded professor luca romoli, leader of the project, “and we've succeeded in mimicking it. magnifico! ” few tasks in life hold less joy than scrubbing the ghost of somebody else’s porridge from a saucepan. the starting point for the research was the leaves of the lotus flower.

Where is the main header supposed to be placed, when formatting a transcript ? how many spaces before the body of the dialogue ? two three or four ?