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【多选题】
下列各项描述正确的是( )。
A.
如果集合 A 的任何一个元素都是集合 B 的元素，则称  A 是 B 的子集。
B.
空集是任何集合的子集。
C.
全集记作U。
D.
Z表示正整数集。
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参考答案：
举一反三
【单选题】Admitting ______ wrong should not be the rea son for our not admitting those who want to join the League _____ the organization. [     ]
A.
to have done; to
B.
having done; for
C.
doing; to
D.
to do; for
查看完整题目与答案
【单选题】The number of people who ____English as a foreign language __more than 750 million.
A.
learns; is
B.
learn; are
C.
learns; are
D.
learn; is
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【单选题】单项桥式整流电路中接入电容滤波器后, 输出电压( )
A.
升高
B.
降低
C.
不变
D.
无法判断
查看完整题目与答案
【单选题】Among the American young intellectuals in the 1830s and 1840s, who was regarded as the leader of transcendalism?
A.
Ralph Waldo Emerson.
B.
Henry David Thoreau.
C.
Walt Whitman.
D.
Mark Twain.
查看完整题目与答案
【单选题】在多媒体系统中，最适合存储声、图、文等多媒体信息的是（ ）
A.
软盘
B.
硬盘
C.
CDROM
D.
ROM
查看完整题目与答案
【单选题】The underlined part 'print-illiterate' in the text refers to_______
A.
one who has never learnt printing
B.
one who has never learnt to read
C.
one who is not a computer literate
D.
one who is not able to use a typewriter
查看完整题目与答案
【简答题】Money Matters for Students GETTING A GRANT(补助) Who pays? The local education authority (LEA) for the area in which the student is living. Who can get this money? Anyone who gets a place on a first deg...
查看完整题目与答案
【单选题】在多媒体系统中，最适合存储声、图、文等多媒体信息的是（）。
A.
激光视盘
B.
硬盘
C.
CD-ROM光盘
D.
ROM
查看完整题目与答案
【简答题】Getting a Grant (补助) Who Pays? The Local Education Authority ( LEA) for the area in which the student is living. Who Can Get the Money? Anyone who gets a place on a first-degree course, although a stu...
查看完整题目与答案
【单选题】What's wrong with Maggie?
A.
She doesn't want to go to the dance.
B.
She is nervous about asking Brian to the dance.
C.
She is not allowed to go to the dance.
查看完整题目与答案
相关题目：
【单选题】Admitting ______ wrong should not be the rea son for our not admitting those who want to join the League _____ the organization. [     ]
A.
to have done; to
B.
having done; for
C.
doing; to
D.
to do; for
查看完整题目与答案
【单选题】The number of people who ____English as a foreign language __more than 750 million.
A.
learns; is
B.
learn; are
C.
learns; are
D.
learn; is
查看完整题目与答案
【单选题】单项桥式整流电路中接入电容滤波器后, 输出电压( )
A.
升高
B.
降低
C.
不变
D.
无法判断
查看完整题目与答案
【单选题】Among the American young intellectuals in the 1830s and 1840s, who was regarded as the leader of transcendalism?
A.
Ralph Waldo Emerson.
B.
Henry David Thoreau.
C.
Walt Whitman.
D.
Mark Twain.
查看完整题目与答案
【单选题】在多媒体系统中，最适合存储声、图、文等多媒体信息的是（ ）
A.
软盘
B.
硬盘
C.
CDROM
D.
ROM
查看完整题目与答案
【单选题】The underlined part 'print-illiterate' in the text refers to_______
A.
one who has never learnt printing
B.
one who has never learnt to read
C.
one who is not a computer literate
D.
one who is not able to use a typewriter
查看完整题目与答案
【简答题】Money Matters for Students GETTING A GRANT(补助) Who pays? The local education authority (LEA) for the area in which the student is living. Who can get this money? Anyone who gets a place on a first deg...
查看完整题目与答案
【单选题】在多媒体系统中，最适合存储声、图、文等多媒体信息的是（）。
A.
激光视盘
B.
硬盘
C.
CD-ROM光盘
D.
ROM
查看完整题目与答案
【简答题】Getting a Grant (补助) Who Pays? The Local Education Authority ( LEA) for the area in which the student is living. Who Can Get the Money? Anyone who gets a place on a first-degree course, although a stu...
查看完整题目与答案
【单选题】What's wrong with Maggie?
A.
She doesn't want to go to the dance.
B.
She is nervous about asking Brian to the dance.
C.
She is not allowed to go to the dance.
查看完整题目与答案
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