用稀释涂布平板法来统计样品中活菌的数目，其结果与实际值相比[ ]

A．比实际值高

B．比实际值低

C．和实际值一致

D．比实际值可能高也可能低

Friendship helps us understand （） we are, （） we need each other and （） we can do for each other.

A. what when that

B. who why what

C. where why that

D. who when how much