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【简答题】
阅读短文,根据其内容回答问题。 Many people have jobs. They go to work nearly every day. Some people are lucky. Either they have very interesting jobs or they make a lot of money Most people are not so lucky. Either their jobs are not very interesting or they don't make much money. The most interesting jobs are often the most difficult. People take a long time to learn how to do them. Doctors study for at least six years after finishing school. Some young people have interesting and high-pay jobs. Many young players do their work successfully. Football and tennis stars are usually under 35 years old. Older people usually can not play these sports very well. They cannot move fast enough. Golf, however, is a good sport for older people. Many golf players are quite old, but they can play it successfully. Most people work until they are 60 or 65 years old. Then they retire (退休) and have a lot of free time. Some people never retire though. These people usually have very interesting jobs Writers, artists, scientists and actors (演员) usually work until they die. Their work is their life. 1.Do most people have interesting and high-pay jobs? ______________________________________________________________________________ 2.Why do some jobs have to be taken a long time to learn? ______________________________________________________________________________ 3.What sports are young people good at? ______________________________________________________________________________ 4.Why is golf a good sport for older people? ______________________________________________________________________________ 5.When do some people who have interesting jobs retire? ______________________________________________________________________________
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皮皮学刷刷变学霸
举一反三
【单选题】图示电路中 , 若I=0 , 则 U a 为 ( ) 。
A.
60 V
B.
70 V
C.
90 V
D.
-10 V
【简答题】液压机一般由 和 两部分组成。
【简答题】图示电路中,开关 S 在 t=0 时闭合,若 u C (0 - )=0V ,则通过电容的电流 i 1 ( 0 + ) = ________ A
【判断题】中医的藏象学说完全是在五行学说基础上建立起来的。
A.
正确
B.
错误
【单选题】在 图 示 电 路 中,开 关 S 在 t = 0 瞬 间 闭 合,若 u C (0-) = 0V , 则 i 1 (0+) 为 ( )A 。
A.
1.2
B.
0
C.
0.6
D.
-0.6
【单选题】在图所示电路中,若 u I 为正弦波电压 ,则 u 0 为( ) 。
A.
与 u i 同相的正弦波电压
B.
与 u i 反相的正弦波电压
C.
脉冲矩形波电压
D.
方波电压 方波电压
【单选题】在 图示电路中,开关 S 在 t = 0 瞬间闭合,若 u C ( 0 - )=0V ,则 i 1 ( 0 + ) 为 ( ) 。
A.
1.2A
B.
0A
C.
0.6A
D.
-0.6A
【简答题】图示电路中, N 0 为不含独立源的线性网络。当 U S =0 、 I S =1A 时, I =0.5A ;当 U S =2V 、 I S =1A 时, I =1A 。若已知 I S =2A , I =3A ,则 U S 为 _______ V 。
【单选题】存储和控制的主要原因是()。
A.
二进制数的0和1可分别表示逻辑代数的"假"和"真",适合计算机进行逻辑运算
B.
二进制数数码少,比十进制数容易读懂和记忆
C.
二进制数数码少,存储起来占用的存储容量小
D.
二进制数数码少,在计算机网络中传送速度快
【单选题】在图所示电路中,若 u I =-0.5V ,则输出电流 i 0 为( )。
A.
10mA
B.
5mA
C.
-5mA
D.
-10mA
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