现有： public class Pet（） public class Cat extends Pet{） 执行代码 Cat c- new Cat（）； Pet p= （Pet）c； 后下列哪项是正确的？（）
He seldom does his homework at school on weekdays,（）he?
现有： public class Pet() public class Cat extends Pet{) 执行代码 Cat c- new Cat()； Pet p= (Pet)c； 后下列哪项是正确的？（）
CAT3终端和CAT4终端描述哪些是正确的（）
When we say somebody only goes to the library once in a blue moon, we imply that he seldom goes to the library.
Seldom _________ any apology when mistakes are made.
The woman and her husband seldom quarreled and they were happier together than most couples of their age.
I have been living in the United States for twenty years, but seldom _______ so lonely as now.
Seldom will things _______ you if you can always keep cool, especially when dealing with personal issues.
She seldom goes to the theatre, ?
听力原文：W: Seldom did I go to dancing balls when I was at college. I was indulged in books day after day.
在UNIX操作系统中，若用户键入的命令参数的个数为1时，执行cat$1命令；若用户键入的命令参数的个数为2时，执行cat＞＞$2＜$1命令。请将下面所示的Shell程序的空缺部分补齐。 case(51)in 1)cat$1;; 2)cat＞＞$2＜$1;; *)echo'default……' esac (51)
Seldom ____ go out for fun on weekdays.
She is seldom, ______, absent from school.
●在UNIX操作系统中，若用户键入的命令参数的个数为1时，执行cat＄1命令；若用户键入的命令参数的个数为2时，执行cat＞＞＄2＜＄1命令。请将下面所示的Shell程序的空缺部分补齐。case (51) in1)cat＄1；；2)cat＞＞＄2＜＄1；；*)echo 'default……'esac(51)
下面哪个命令可以查看网卡的中断（)。A.cat/proc/ioportsB.cat/proc/interruptsC.cat/proc/memoryi
Linda can barely read and write though she has recently graduated from high school（)。A、seldom
This kind of material was seldom used in building houses during the Middle Ages.
He is quite thoughtless, for very seldom can he ______ other people' s troubles.
A Speech－－ Better Lives for AllIn today' s society, working people can seldom find
(性能)CATⅡ或CATⅢ自动进近、着陆和滑跑的风极限是()。
(SOP)对于精密进近(CAT2和CAT3)的程序中，决断高输入到什么位置()。
Moses became the symbol of （） after he led the Hebrews out of the prosecution of Egypti
Seldom did we realize that many of our hair problems______what we eat.
