【正文】
rk: Have each student tie a string to one corner of the handkerchief. Show them how to tie the object with the strings. Take the groups to an elevated area and allow them to throw their parachutes over the edge. T: What happens? P: The parachute rides on air. and recite the poem. a parachute. the new words. 通過小詩,讓學(xué)生理解空氣的特點(diǎn)及作用。 復(fù)習(xí) signs, 鞏固所學(xué)。