6月5日是世界环境日,下列关于环境保护和资源利用的说法,正确的是( )
A:我国水资源在空间上分配不均匀,但在时间上分配均匀
B:南水北调工程主要影响了水循环的水汽输送环节
C:地球是一个巨大的“水球”,其中冰川水是地球总水体的主要部分
D:我国水土流失、沙漠化等现象比较严重
在“检测不同环境中的细菌和真菌”实验中,“打开培养皿,暴露在空气中5﹣10分钟,再盖上,封好”的过程相当于细菌培养过程的哪一步骤( )
Mr Green is an Englishman. He teaches English well His English classes are very interesting. He likes us and we like him, too.Mr Green has two children----Mike and Nancy. Mike is eight and his sister Nancy is five. Mike goes to school but Nancy doesn't. Mr Green likes to wear a T-shirt and a pair of jeans. Football is his favorite sport. After school we often have a basketball match. Sometimes Mr Green watches and joins us. He plays basketball just for us.