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【单选题】
xt0505426酸度计使用前必须熟悉使用说明书,其目的在于()。
A.
掌握仪器的性能，了解操作规程
B.
了解电路原理图
C.
掌握仪器的电子构件
D.
了解仪器结构
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【单选题】某元素的原子核外有 3 个电子层,最外层有 5 个电 子,该原子核内的质子数为( )
A.
14
B.
15
C.
16
D.
17
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【单选题】In the first decade( )was welcomed to the technical world.
A.
transistor
B.
the vacuum tube
C.
television
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【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
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【判断题】高素质人才的获取和开发,是现代企业可持续发展的关键
A.
正确
B.
错误
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【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
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【单选题】花生四烯酸是
A.
短链脂肪酸
B.
中链脂肪酸
C.
单不饱和脂肪酸
D.
多不饱和脂肪酸
E.
饱和脂肪酸
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【单选题】某元素的原子核外有3个电子层，最外层有7个电子，其核内的质子数为
A.
14
B.
15
C.
16
D.
17
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【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
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【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
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【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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【单选题】某元素的原子核外有 3 个电子层,最外层有 5 个电 子,该原子核内的质子数为( )
A.
14
B.
15
C.
16
D.
17
查看完整题目与答案
【单选题】In the first decade( )was welcomed to the technical world.
A.
transistor
B.
the vacuum tube
C.
television
查看完整题目与答案
【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
查看完整题目与答案
【判断题】高素质人才的获取和开发,是现代企业可持续发展的关键
A.
正确
B.
错误
查看完整题目与答案
【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
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【单选题】花生四烯酸是
A.
短链脂肪酸
B.
中链脂肪酸
C.
单不饱和脂肪酸
D.
多不饱和脂肪酸
E.
饱和脂肪酸
查看完整题目与答案
【单选题】某元素的原子核外有3个电子层，最外层有7个电子，其核内的质子数为
A.
14
B.
15
C.
16
D.
17
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案