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【判断题】
蜗杆传动不适合用于大功率连续工作的场合
A.
正确
B.
错误
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【单选题】A young girl wishes to select one of the frictionless playground slides illustrated below to give her the greatest possible speed when she reaches the bottom of the slide. Which of the slides illustra...
A.
Slide 1
B.
Slide 2
C.
Slide 3
D.
Slide 4
E.
It doesn’t matter, her speed would be the same for each slide
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【判断题】斜度是指一直线相对于另一直线或一平面相对于另一平面的倾斜程度。
A.
正确
B.
错误
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【单选题】根据楞次定律可知感应电流的磁场一定是[ ]
A.
阻碍引起感应电流的磁通量
B.
与引起感应电流的磁场反向
C.
阻碍引起感应电流的磁通量的变化
D.
与引起感应电流的磁场方向相同
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【单选题】根据楞次定律知感应电流的磁场一定是( )
A.
增强引起感应电流的磁通量的变化
B.
与引起感应电流的磁场反向
C.
阻碍引起感应电流的磁通量的变化
D.
与引起感应电流的磁场方向相同
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【单选题】系统命名法命名脂肪酸：CH3CH2CH=CHCH2CH=CHCH2CH=CHCH2CH=CHCH2CH=CH(CH2)3COOH
A.
5，8，11，14，17-二十二碳五烯酸
B.
5，8，11，14-二十二碳四烯酸
C.
5，8，11，14，17-二十碳五烯酸
D.
5，8，11，14-二十碳四烯酸
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【单选题】根据楞次定律知感应电流的磁场一定是()。
A.
阻碍引起感应电流的磁通量的变化
B.
阻碍引起感应电流的磁通量
C.
与引起感应电流的磁场方向相同
D.
与引起感应电流的磁场反向
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【单选题】The basic principle of radar is illustrated by what happens when one shouts in a cave. The echo of the shouting (11)______ the walls helps a person determine the size of the cave. With radar，however，t...
A.
through
B.
for
C.
on
D.
against.
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【单选题】When the illustrated circuit uses the current source Is and the conductance Gs in parallel as an equivalent circuit, the Is and Gs values are___________ respectively. Choose A,B,C or D.
A.
6A, 1/2 S
B.
4A, 1/3 S
C.
2A,1/6 S
D.
6A,1/3 S
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【单选题】When it came to hunting, which of the following illustrated the discrepancy(差异) between Neanderthals and Sapiens?
A.
The latter ones chased animals with sharp sticks instead of square stones.
B.
The former ones preferred targeting an entire herd.
C.
The latter ones usually hunted in large groups.
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【单选题】The main point of the first two paragraphs can best be illustrated as
A.
when a machine like a rotary engine malfunctions, it is the technologist who is best equipped to repair it
B.
a telephone is a complex instrument designed by technologists using only nonverbal thought
C.
the designer of a new refrigerator should consider the designs of other refrigerators before deciding on its final form
D.
the distinctive features of a suspension bridge reflect its designer's conceptualization as well as the physical requirements of its site
查看完整题目与答案
相关题目：
【单选题】A young girl wishes to select one of the frictionless playground slides illustrated below to give her the greatest possible speed when she reaches the bottom of the slide. Which of the slides illustra...
A.
Slide 1
B.
Slide 2
C.
Slide 3
D.
Slide 4
E.
It doesn’t matter, her speed would be the same for each slide
查看完整题目与答案
【判断题】斜度是指一直线相对于另一直线或一平面相对于另一平面的倾斜程度。
A.
正确
B.
错误
查看完整题目与答案
【单选题】根据楞次定律可知感应电流的磁场一定是[ ]
A.
阻碍引起感应电流的磁通量
B.
与引起感应电流的磁场反向
C.
阻碍引起感应电流的磁通量的变化
D.
与引起感应电流的磁场方向相同
查看完整题目与答案
【单选题】根据楞次定律知感应电流的磁场一定是( )
A.
增强引起感应电流的磁通量的变化
B.
与引起感应电流的磁场反向
C.
阻碍引起感应电流的磁通量的变化
D.
与引起感应电流的磁场方向相同
查看完整题目与答案
【单选题】系统命名法命名脂肪酸：CH3CH2CH=CHCH2CH=CHCH2CH=CHCH2CH=CHCH2CH=CH(CH2)3COOH
A.
5，8，11，14，17-二十二碳五烯酸
B.
5，8，11，14-二十二碳四烯酸
C.
5，8，11，14，17-二十碳五烯酸
D.
5，8，11，14-二十碳四烯酸
查看完整题目与答案
【单选题】根据楞次定律知感应电流的磁场一定是()。
A.
阻碍引起感应电流的磁通量的变化
B.
阻碍引起感应电流的磁通量
C.
与引起感应电流的磁场方向相同
D.
与引起感应电流的磁场反向
查看完整题目与答案
【单选题】The basic principle of radar is illustrated by what happens when one shouts in a cave. The echo of the shouting (11)______ the walls helps a person determine the size of the cave. With radar，however，t...
A.
through
B.
for
C.
on
D.
against.
查看完整题目与答案
【单选题】When the illustrated circuit uses the current source Is and the conductance Gs in parallel as an equivalent circuit, the Is and Gs values are___________ respectively. Choose A,B,C or D.
A.
6A, 1/2 S
B.
4A, 1/3 S
C.
2A,1/6 S
D.
6A,1/3 S
查看完整题目与答案
【单选题】When it came to hunting, which of the following illustrated the discrepancy(差异) between Neanderthals and Sapiens?
A.
The latter ones chased animals with sharp sticks instead of square stones.
B.
The former ones preferred targeting an entire herd.
C.
The latter ones usually hunted in large groups.
查看完整题目与答案
【单选题】The main point of the first two paragraphs can best be illustrated as
A.
when a machine like a rotary engine malfunctions, it is the technologist who is best equipped to repair it
B.
a telephone is a complex instrument designed by technologists using only nonverbal thought
C.
the designer of a new refrigerator should consider the designs of other refrigerators before deciding on its final form
D.
the distinctive features of a suspension bridge reflect its designer's conceptualization as well as the physical requirements of its site
查看完整题目与答案