单项选择题 听力原文： Haitian hunger strikers at the US base at Guantanamo Bay, Cuba, have begun refusing all fluids and medical treat menu. Fifteen of 267 Haitians are at the base. Seven are prepared to die if necessary to force the US to admit the rest of them. The Haitians are eligible to pursue political asylum in the US, but have been barred from entry because most have the AIDS virus. The Clinton Administration says they would lift the ban on their entry, but it is not known when.Some Haitians are on strike in order to ______.A．get proper medical treatmentB．ask for their political rightsC．protest against the US decisionD．demand food supply aid from the US

单项选择题 The example of Sallie Mae Company is used by the author to （）

单项选择题 IP地址规定用（）组十进制数表示，每组数字之间用小数点分隔。