A: Good morning. Can I help you?

B: __1___. I’d like some apples.

A: Oh, we have very nice apples here.

B: _2___

A: Ten Yuan a kilo.

B: Three kilos, please.

A: What else do you want? ___3___. They are only six yuan a kilo.

B: Good idea.

A: __4___

B: Two kilos please.

A: __ 5____ Forty-two Yuan, please.

B: Thanks.  Here is the money.

A: Here you are.

B: How about some bananas?

C: Yes, please.

D: How   many bananas do you want?

E: How much are they?

关于照片影像密度、对比度、锐利度相互关系的叙述，错误的是

A．密度是对比度、锐利度的基础

B．照片对比度可随密度的改变而改变

C．锐利度与对比度无直接关系

D．看片灯的亮度也影响着照片对比度的视觉效果

E．在高密度背景下，对比度小的物体影像难以辨认