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【简答题】
Shanghai is not only the largest seaport (港口) city and economic center of China, but also the modern and fashionable international city as well. It lies in the east of China and faces the East China Sea. With a long history, there are many interesting places in Shanghai. It is really a good place to go on vacation. Also, since it’s a modern city, Shanghai is a good place to go shopping. You can see many fashionable things there. Walking along the Nanjing Road and the Huaihai Road, you will follow the latest fashion. Come to Shanghai, please! But don’t forget to take your umbrella because it rains a lot here in Summer. Shanghai Where 小题1: What kind of city 小题2: Not only 小题3:But also What place 小题4: The weather in summer 小题5: Welcome to Shanghai
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参考答案:
举一反三
【单选题】下列说法不正确的是()
A.
触发器是边沿触发,锁存器是电平触发
B.
为避免由于干扰引起误触发,应选用边沿触发器
C.
不定状态是指无论如何都不影响正常功能的状态
D.
RS触发器有空翻的缺点,可采用主从结构避免
【简答题】投影按照投射线相互之间关系和对投影面的方向不同,投影分为 和 两类。
【单选题】已知tana、tanβ是方程2x2—4x+1=0的两根,则tan(α+β)=( )
A.
4
B.
-4
C.
4/3
D.
8
【简答题】已知tana=2,则tan(a- )=
【简答题】若锐角A满足tanA-cotA=2,则tan 2 A+cot 2 A=______.
【简答题】tana=4,则tan2a=
【简答题】tanA-cotA=2,则tan 2 A+cot 2 A=______.
【判断题】单片机在电路设计中优于传统的数字电路。
A.
正确
B.
错误
【单选题】已知tana=4,tanβ=3,则tan(a+β)=(  )
A.
- 7 11
B.
π 3
C.
3 2
D.
- 7 13
【单选题】若 1-tanA 1+tanA =2,则tan(45°-A) 等于(  )
A.
-2
B.
2
C.
1 2
D.
- 1 2
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