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【简答题】
阅读理解。 When Ben Franklin was only a boy, he always wanted to know about things. He was always asking his father and brothers 'What?' and ' How?' and 'Why?'. They couldn't always tell him what he wanted to know. When they couldn't tell him, Ben try to find the answer by himself. Many times Ben did find out things that no one knew before. The other would say, 'That Ben Franklin! He is always finding out something new!' Ben lived close to the water. He liked to go there to see the boats. He saw how the wind blow them across the river. One day Ben said to himself, 'Why can't the wind help me float (漂浮) across the water? And I'm going to try.' Ben got his big kite. He took hold of the kite's sting and ran with it. The wind took the kite up into the air. Then Ben jumped into the water. The wind blew the kite high into the sky. Ben began to float across the water. Soon he was on the other side, and he did not work at all . One boy shouted, 'Look at Ben floating across the water! His kite takes him to the other side without any work!' 1. When he was a child, Ben _____. [     ] A. liked to fly a kite by himself B. always asked easy questions C. always liked to play with water D. always liked to find out how things worked 2. His father and brothers ____. [     ] A. couldn't answer all his questions B. could answer all his questions C. tried hard to find out something new for him D. were too busy to answer his questions 3. How did Ben Franklin float across the water? [     ] A. The other boy took him across it. B. The water carried him across it. C. The flying kite took him across it. D. A boat took him across it. 4. He found out many things that _____. [     ] A. children didn't know B. his father and brothers knew C. people didn't know D. most people knew 5.In the passage,' and he did not work at all ' means _____. [     ] A. he worked hard to cross the water B. he didn't go to work that day C. he didn't cross the water at all D. he crossed the water in an easy way
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【单选题】A pulse is applied to each input of a 2-input NOR gate. One pulse goes HIGH at t=0 and goes back LOW at t=1ms. The other pulse goes HIGH at t=0.8ms and goes back LOW at t=3ms. The output pulse can be ...
A.
It goes LOW at t=0 and back HIGH at t=3ms. 该脉冲在 t=0ms 降为低电平, t=3ms 时返回高电平。
B.
It goes LOW at t=0.8ms and back HIGH at t=3ms. 该脉冲在 t=0.8ms 降为低电平, t=3ms 时返回高电平。
C.
It goes LOW at t=0.8ms and back HIGH at t=1ms. 该脉冲在 t=0.8ms 降为低电平, t=1ms 时返回高电平。
D.
It goes HIGH at t=0.8ms and back LOW at t=1ms. 该脉冲在 t=0.8ms 升为高电平, t=1ms 时返回低电平。
【单选题】两输入或非门,一个输入脉冲在t=0时为高电平,在t=1ms时变为低电平;另一个输入脉冲在t=0.8时为高电平,在t=3ms时变为低电平,则它的输出脉冲:
A.
t=0时为低电平,在t=3ms时变为高电平
B.
t=0.8时为低电平,在t=3ms时变为高电平
C.
t=0.8时为低电平,在t=1ms时变为高电平
D.
t=0.8时为高电平,在t=1ms时变为低电平
【单选题】以下选项中有语法错误的是
A.
char *str[ ]={“guest”};
B.
char str[10 ]={“guest”};
C.
char *str[3] *str[1]={“guest”};
D.
char str[3][10];str[1]={“guest”};
【单选题】近代历史上,中国不败而败的对外战争是
A.
第一次鸦片战争
B.
第二次鸦片战争
C.
中法战争
D.
中日战争
【单选题】对双作用单活塞杆液压缸来说 , 若输入的流量和工作压力不变,则当无活塞杆油腔进油时产生的作用力( )。
A.
较大
B.
较小
C.
不变
【判断题】发现宿舍楼的电闸箱起火,可以用楼内的消防栓灭火。()
A.
正确
B.
错误
【单选题】两个脉冲分别加在一个 2 输入或非门的两个输入上。某一个脉冲在 t=0ms 为高电平,而在 t=1ms 时变为低电平。另一个脉冲在 t=0.8ms 时变为高电平,而在 t=3ms 时变为低电平。输出脉冲应当描述为
A.
在 t=0 时变为低电平,而在 t=3ms 时变为高电平。
B.
在 t=0.8ms 时变为低电平,而在 t=3ms 时变为高电平。
C.
在 t=0.8ms 时变为低电平,而在 t=1ms 时变为低电平。
D.
在 t=0.8ms 时变为低电平,而在 t=1ms 时变为高电平。
【判断题】会计本质上是一种经济管理活动或经济管理工作。( )
A.
正确
B.
错误
【判断题】条区试验设计中,仅可以评估两类的误差。
A.
正确
B.
错误
【单选题】以下选项中有语法错误的是() 。
A.
char * str [ ]={"china"};
B.
char str [][10 ]={"china"};
C.
char * str [3]; str [1]="china";
D.
char str [3][10]; str [1]={"china"};
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