人体吸入较高浓度的H2S后,将与血液中的溶解氧产生化学反应,这样,H2S夺取了血液中的氧,使人体器官()而中毒,甚至死亡。
A.缺血
B.缺水
C.缺氧
D.缺乏营养
参考答案:C
设在菜单编辑器中定义了一个菜单项,名为menu1。为了在运行时隐藏该菜单项,应在程序中使用的语句是
A.menu1.Enabled=True
B.menu1.Enabled=False
C.menu1.Visible=True
D.menu1.Visible=False
Which of the following best describes a Treasury note Pays:()
A. implicit interest; is non-callable; has a 2- to 10-year maturity.
B. explicit interest; is callable; has a 1- to 15-year maturity.
C. explicit interest; is non-callable; has a 2- to 10-year maturity.