给学生提供实践的机会，能更直接的达到学习目标，是运用学习的哪个定律（）
A、练习率
B、准备率
C、学习率
参考答案：A
如图所示，电源电压为6V，开关闭合后，电流表示数为0.2A，电压表示数为4V。求：
（1）通过R1的电流？
（2）R2两端的电压？
（3）R1的阻值？
句型转换。(共15分,每小题3分)
1.I have a cold.(就画线部分提问)
you?
2. My father does exercise every morning.(用be going to改写句子)
My father is ________ exercise tomorrow morning.
3. They have to get up early every day.（改为一般疑问句）
_______they _______ _______ get up early every day?
4. Lucy got to Beijing yesterday.( 改为同义句)
Lucy Beijing yesterday.
5. There will be a school sports meet next week .(改为否定句)
a school sports meet next week.
