计算-a33的结果是( )
There are fewer and fewer tigers in India. The situation will continue ______ humans stop hunting them for their fur and bones.
I like __________ and __________.
2007年9月21日,日本探测船“地球”号在东京以南太平洋一处水深2500米的海洋开始钻探,从海底向下钻入7000米深处,盼能揭示气候暖化秘密,寻找有助于解释生命起源的微生物及了解地震成因.据此回答下题.