A:NaOH溶液
B:KSCN溶液
C:铁片
D:石蕊试液
阅读漫画。《猴子捞月新编》启示我们,在经济社会发展过程中( )
设i为虚数单位,复数z1=a﹣3i,z2=2+bi,其中z1,z2互为共轭复数,则a+b=( )
The doctor advised her to eat more bean products________meat which might be harmful to her heart.