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In order to get good grades in college, studying the right way is even more important than working hard or being smart. One way to studying effectively is to allow no 1 of your study time so that you can 2 fully on your lessons. Additionally, it is essential to 3 your time and materials. When you read, it’s alright to skip over passages which are 4 to your study. The way you behave in class is also important. 5 good notes will help you 6 the information being presented and asking questions will let you know 7 you have got the point or not. Finally, if you study with a group, you can learn more from different 8 and solutions of other students. College life is very demanding. But these study habits will help you 9 well in school. And once you are doing well in your studies, you will have more time in your 10 for fun.
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参考答案:
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【简答题】电路如图 E.2 所示, R 1 =10k Ω , , R 3 =30k Ω , R F =60k Ω , u 1 =1.5V, u 2 = - 0.5V, 求输出电压 。若实现 = - ,电路中电阻元件的参数应如何调整?
【判断题】泡松品质小料几乎没什么用途,属于品质非常差的一类。
A.
正确
B.
错误
【单选题】混凝土用砂,最好选用( C )。
A.
特细砂
B.
细砂
C.
中砂
D.
粗砂
【单选题】如图 1-30 所示电路,若 U=-15V ,则 5V 电压源发出的功率为( )
A.
10W
B.
-10W
C.
5W
D.
-5W
【简答题】2017年六年级数学寒假作业答案第70-71页2017年小学六年级上册数学寒假作业答案P70-71
【判断题】教师主要记录的是幼儿的心理活动。 这种观点
A.
正确
B.
错误
【单选题】配制普通混凝土埋最好选用中砂,以下哪一项不是其原因
A.
中砂细度适当
B.
中砂能满足混凝土的和易性要求
C.
中砂比表面积较大
D.
不增加用水量和水泥用量
【单选题】配制普通混凝土选用砂子最好用( )。
A.
粗砂
B.
中砂
C.
细砂
D.
都可以,与粗细没关系
【单选题】如图D-4所示,R1=20W,R2=40W,若U=100V,求电路总电流I()。
A.
30A
B.
7.5A
C.
2.5A
【单选题】如图D-3所示,若U=140V,R1=10W,R2=25W,则电路的总电阻R为()W.
A.
15
B.
30
C.
50
D.
35
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