-- Could you show me the method of cooking the tasty cookies?
-- Please follow the ______ on the cookbook.
A:direction
B:attention
C:introduction
D:instruction
读“青藏地区图”,回答下列问题.
设a,b为不等的正数,且M=(a4+b4)(a2+b2),N=(a3+b3)2则有( )
有“钢都”之称的,全国重要的黑色金属冶炼基地,是位于辽宁省的( )