源自Comprehension Skills Primary 2 (Dorcas Ang),question 6 on page 4.
1、Some people may think that a damselfly is a dragonfly.In fact,a damselfly is thinner than a dragonfly.Its colour is not as bright as that of a dragonfly.While the dragonfly can fly very fast,even backwards,a damselfly flies slowly.
Q:This passage mainly tells us .