读下图，回答下列问题。

【小题1】图中B所在的地形部位是（ ）

A．山顶

B．山谷

C．陡崖

D．鞍部

【小题2】图中所示小河F的流向大致是（    ）

下列各数： $\frac{1}{7}$ 、3.1415926、﹣ $\frac{\sqrt{3}}{2}$ 、0、π⁰、0.1010010001…（相邻两个1之间0的个数逐次加1）、3 $\sqrt{8}$ 、﹣ $\sqrt{0.4}$ 中无理数有（   ）个．

      Mr Jones was a millionaire(百万富翁). One day he went to stay at a hotel in New York. He hoped to have the cheapest room to live in. Mr Jones asked, "What price(价格) is the room?". The boss (老板) told him. "And which floor is it on?" Again the boss told him. "Is that the cheapest room you have? I' m staying here by myself and only need a small room. "
     The boss said, "That room is the smallest and cheapest we have. But why do you choose a poor room like that? When your son stays here, he always stays at our dearest room. Yours is the cheapest. " "Yes," said Mr Jones, "his father is a very rich man, but mine isn' t.

如图是肾单位及其周围的毛细血管示意图，请据图回答：

 

手握住一个酱油瓶，瓶的开口向上静止在手中不动，以下四种说法不正确的是（  ）