【单选题】在网络202.115.144.0/20中可分配的主机地址数是( )。
【单选题】14 Questions 13 to 15 are based on the passage you have just heard.
A.
When two commercial airplanes crashed within months.
B.
When the speed of commercial airplanes greatly increased.
C.
When investigators found the weakness of rectangular windows.
D.
When commercial airlines began to develop faster
【单选题】1980年至1999年间出生的法国年轻人,最近被贴上了“Y”一代的标签。之所以得名,有几种解释。首先,字母Y的形状让人联想到耳挂式耳机,而“Y”一代最显著的特征就是耳机不离身,音乐随身听。其次,1959年至1980年间出生的一代人被称为“X”一代,1990年《时代》杂志封面文章将其解读为“被抛弃、被遗忘的一代”,按照字母顺序,之后的一代就是“Y”一代。此外,字母Y代表了“为什么”的英语单词“why...
【单选题】14 Questions 12 to 15 are based on the conversation you have just heard.
A.
He thinks it is exciting and challenging.
B.
He thinks it contributes a lot to society.
C.
He thinks it is well-paid.
D.
He thinks it is quite easy.
【单选题】14 Questions 12 to 15 are based on the conversation you have just heard.
A.
Reschedule her timetable.
B.
Go on to the university website.
C.
Visit the registration office.
D.
Ask the professor for help.
【单选题】根据遗忘的时间长短,可以将以往分为( )。