任务型阅读

　　There are some students in front of the lost and found box. The duty monitor Alan is asking some questions.

Alan: Jim, is this your English book?

Jim: No, it isn't.

Alan: Linda, is this your English book?

Linda: Yes, it is. Thanks.

Alan: Gina, what colour is your pencil?

Gina: It's green.

Alan: Is this your pencil?

Gina: Yes, it is. Thank you.

Alan: What is your name?

Jenny: My name is Jenny.

Alan: Is your ruler green or yellow?

Jenny: It's green. There’s my name “Jenny” on it.

Alan: Oh, here you are.

Alan: Here’s a nice bag; whose bag is this?

Paul: Let me see. . .  Oh, it's mine.

Alan: Look at the cute doll. Is this yours, Mary?

Mary: No, it isn't. I think it’s Betty's. Is there a watch in it?

Alan: Sorry, I haven’t seen it so far.

根据对话内容, 完成以下任务。

如图，AB⊥AC，BF是∠ABC的角平分线，若∠BFC=110°，求∠C的度数？

阅读材料，回答问题。

材料一：

材料二：“千里长河一旦开，亡隋波浪九天来。银河未落干戈起，惆怅龙舟更不回。”

材料三：唐朝诗人皮日休曾说过，此河北通…之渔商，南运…之转输，其为利也博哉。

马的体细胞中有32对染色体，驴的有31对，马和驴交配的后代是骡，骡的体细胞中染色体是63条。