最佳答案:a wood stick with sparkburning bar/stick
最佳答案:A trip to the Mars
最佳答案:火星历史博物馆The Mars history museum
最佳答案:The surface of Mars is more like that of the earth.
最佳答案:It has already taken several months to arrive at the Mars.
最佳答案:The diameter of Mars is only half of that of Earth.
最佳答案:After twenty years from now,people will be able to resort to the moon and Mars