下列数值中是不等式2x+3>9的解的是( )
A:-2
B:0
C:2
D:4
月球上没有空气,若宇航员在月球上将羽毛和石块从同一高度处同时由静止释放,则( )
阅读理解
Hello, my name is John. I have PE, art and English on Tuesday(星期二). It's my favourite day. I like English. Look, that is my math teacher. He's very kind. His name is Li Hai. I like beef very much, but I don't like apples. I like bananas, too.
读古诗《古朗月行》,这首诗的作者是____朝著名诗人____,字____,号____。
用显微镜观察“人体口腔上皮细胞”临时装片时,在不同放大倍数下,观察到甲、乙两个事视野(如图所示).下列描述正确的是( )