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【单选题】
( )网络管理具有灵活性和可伸缩性。A.
分布式
B.
集中式
C.
开放式
D.
封闭式
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举一反三
【单选题】In the first decade( )was welcomed to the technical world.
A.
transistor
B.
the vacuum tube
C.
television
【单选题】The world's first test-tube baby was ______________ who was born in Britain in 1978.
A.
Louise Brown
B.
Louise Paxton
C.
Lucy Brown
D.
Lilly Brown
【单选题】The first test-tube baby of China was born in Beijing on March 10, _______.
A.
1980
B.
1985
C.
1988
D.
1998
【单选题】The Art Director starts the meeting by remembering the type of monitor she used when she first started in the business. Her first display device was a CRT monitor that used a ____ ray tube.
A.
television
B.
candela
C.
cathode
D.
crystal
【单选题】The tube was first built in the ____ of London.
A.
centre and north
B.
east and north
C.
west and south
D.
centre and south
【简答题】花生四烯酸是______。 (A)十八碳三烯酸 (B)十八碳二烯酸 (C)二十二碳六烯酸 (D)二十碳四烯酸
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