生物多样性
参考答案:生物多样性:是生物和它们组成的系统的总体多样性和变异性。
把1m3的正方体木块切割成1dm3的小正方体,共可得( )块,把这些小正方体摆成一行,长( )千米。
There a class meeting next week.
A.will have
B.is going to have
C.will has
D. is going to be