用There be句型和介词in,on,under, beside写三句完整而有意义的英文句子。
There is a ball under the chair. There is a box on the table. There are some eggs in the box. There are three carrots beside potatoes.
下列各种图形相似的是 ( )
某氧原子的质最为ag,12C原子的质量为bg,且NA表示阿伏加德罗常数,下列说法中正确的是( )
草芽____
A.夏
谷穗____
B.秋
雪人____
C.春
荷叶____
D.冬