There are a lot of people in the park on Sundays. Some are flying kites, _____ are sitting under the big

trees.          [ ]

A. the other      

B. other        

C. others        

D. another

配制φ（C₂H₅OH）=50%，可量取无水乙醇500mL加水稀释至（）。

A.100mL

B.10mL

C.1000mL

D.10000mL