the litmus paper turns blue when the solution is a base 当溶液是
When the Audet family turns on the lights at Blue Farm,they
When a light turns red,we ________cross the road.
英语翻译This paper presents a closed-form solution of the swept
When the temperature________,ice turns into water
When our part of the earth turns away from the sun,it is day
when our part of the earth turns ____ from the sun ,it is ni
When our part of the earth turns(转) ___ the sun,it is night.
The movie is ____(base) on a real story.
When the old man comes home in a temper,he turns the whole h
What is the paper(
When ourpart of earth turns to the sun,it is day
Ice turns into water when the temperature is ____ (超过) 0℃