(-3)2÷|-34|-(-2)3×(-14)
=9÷34-(-8)×(-14)
=9×43-2
=12-2
=10.
(江苏省南通市2009期末调研)What lessons China can draw from global financial crisis has become ________hot topic among us students.
A.the; a
B.不填; a
C.a; the
D.不填; the
将某份铁铝合金样品均分为两份,一份加入足量盐酸,另一份加入足量NaOH溶液,同温同压下产生的气体体积比为3∶2,则样品中铁、铝物质的量之比为[ ]
A.3∶2
B.2∶1
C.3∶4
D.4∶3