土地定级单元是评定和划分土地级别的基本空间单位，是内部特性和外部条件相对均一的地块。()

What does the speaker feel about summer pictures

A．Summer films might cause mental damage to the audience.

B．Summer films need to give due respect to the audience’s intelligence.

C．Summer films should cater to both children and grownups.

D．Summer films should not target at the mass-market.