已知m﹣n=3,则2(n﹣m)2﹣(n﹣m)3﹣7的值[ ]
A.﹣16
B.38
C.﹣2
D.2
答案:B
血清铁降低,总铁结合力增高为()
A.缺铁性贫血
B.再生障碍性贫血
C.珠蛋白合成障碍性贫血
D.慢性病性贫血
E.铁粒幼细胞性贫血
Stations in the United States of America are grouped by states arranged in the alphabetical order of their().
A.countries
B.states
C.names
D.groups