"Helicopter parents" is the name given to the obsessively protective moms and dads who "hover" around their kids.
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According to the lecture, positive relationships are important for good health. If you have supportive, loving relationships you are more likely to feel happy and satisfied with your life.
A. 对
B. 错
p28-1.5.1在图中负载增加是指（）
A. 负载电阻R增加
B. 负载电流增加
C. 电源端电压啊U增加
P28-1.5.2
A. 4.6
B. 2.2
C. 4.4
P29-1.5.3
A. 100W
B. 50W
C. 25W
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