爱国诗人丘逢甲在《春愁》中写道:“四百万人同一哭,去年今日割台湾。”诗中的“去年”是指哪一年 [ ]
A.1842
B.1860
C.1894
D.1895
答案:D
引起接触致敏反应的致敏因子是()。
A.低毒性物质
B.弱刺激性物质
C.半抗原
D.完全抗原
E.抗原复合物
—_____ the population of the U.S.A. in 2005?
—It _____ about 296 million.
A.What is; is B.What was; was
C.How many is; was D.How many was; is