What did the boy do last night?
A:He went to the party.
B:He saw a movie.
C:He did some reading.
你能用2,3,4,9和+﹣×÷及____ ,写出得数是24的算式吗?试一试,并解答.
橘子腐烂后,出现一些青绿色的霉斑,在显微镜下可见到一些扫帚状的孢子,这种霉菌是()
—_______.