首都北京地理位置的优越性体现在（ ）。

①位于华北平原的北部边缘，背靠群山，面向渤海

②名胜古迹众多

③是全国最重要的交通运输枢纽之一

④我国大城市之一

根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。在答题卡标有题号的横线上，写出空缺处所填单词的正确形式。
⑴The ____ will drop below zero. (温度) 
⑵You should understand the____ of learning English well.(重要性)
⑶All of us know bad weather sometimes causes ____ disasters. (自然的)
⑷The ____ girl named Susanne in the world weighs nearly 700 kilograms now. （胖)
⑸Ladies and gentlemen, please let me ____  my best friend to you. (介绍)
⑹____ , he didn't hurt badly in the terrible accident. (lucky)
⑺The ____ are busy fishing in the lake. (fish)
⑻The shoes are ____  to wear, I will not buy them. (comfortable )
⑼Help ____ to some meat, boys and girls. (you)
⑽You had better____  at home until it stops raining. (stay)

三个数3^0.4，0.4³，3^0.3的大小关系（　　）