根据图中提供的信息，解答下列问题：

三峡水利枢纽工程是中国规模最大的水利枢纽工程，如图所示．枢纽控制流域面积约1.0×10⁶km²，占长江流域面积的56%，坝址所在位置年平均流量为Q=4.51×10¹¹m³．水利枢纽的主要任务包括防洪、发电、航运三方面，在发电方面，三峡水电站共安装32台7×10⁵kW水轮发电机组，另外还有2台5×10⁴kW电源机组，总装机容量（指34台发电机组同时工作时的总发电功率）P=2.25×10⁷kW，设计年发电量约W=10¹¹kW•h．

阅读上述材料，解答下列问题（水的密度ρ=1．O×10³kg/m³，取g=10N/kg）：

（1）若三峡电站上、下游水位差按h=110m计算，试求三峡电站将水的势能转化为电能的效率η．

（2）若34台发电机组全部发电，要达到年发电量的要求，每台发电机组平均年发电机组平均年发电时间t为多少天？

Sally: Good afternoon, Jenny.

Jenny: Good afternoon, Sally.

Sally: Oh, Jenny, this is my aunt Alice. Alice, this is my friend Jenny.

Jenny: Nice to meet you, Alice.

Alice: Nice to meet you, too, Jenny. Your school is very good. I like (喜欢) it.

Jenny: I like it, too.

Sally: Jenny is a good English teacher. Her students (学生) like her.

Jenny: Thank you, Sally.

Alice: Well, have a good day!

Sally & Jenny: Thanks. You, too. Bye.

根据材料内容判断正误。

— Jim took          one-hour ride just now. What a short time he spent finishing such a long way!
— He is           experienced rider.