小明在观察“碘锤”中的物态变化之前,查阅资料得知:酒精灯外焰的温度约为800℃.碘的熔点为113.7℃.我们选用图____方式加热,理由是____.
-Theyoungmanwhoenteredourfactorylastmonthhasmadesomemistakesthisweek.
-Well._______.
Iusuallywalktoschool,but____buswhenitrains.
I'llarriveat10:00a.m.tomorrow.Willyoupleasemeetmeattheairport?
------___________.
图1漫画给我们的启示是()。