广告行来自律
参考答案:
指广告行业组织,通过制定相关的自律守则和条文,所实行的行业自我管理、控制和约束。
根据句意或首字母填词。
1. Do you have a healthy l_______? Do you have good e_______ habits?
2. Eating a lot of vegetables is good for our _______ .
3. —Can I help you?
—Of _______, I'd like a hamburger, please.
4. Don't worry. M _______he can help you.
5. This picture is d _______ from that one, can you tell me the d_______ between
the two pictures?
6. My grandfather is still healthy, a_______ he is over 80 years old.
7. I got good g_______with the help of my English teacher last term.
8. Some students always s _______ the Internet to get more information.
9. My mother has a healthy lifestyle. She eats l_______ junk food but more vegetables.
在图(a)所示的电路中,电源电压为6伏且不变,滑动变阻器R2标有“50Ω 3A”字样。闭合电键S后,电流表A1的示数为0.6安。求:
(1)电阻R1的阻值。
(2)将变阻器R2的滑片P移至某点时,某电流表的示数如图(b)所示,10秒内变阻器R2所消耗的电能W2。
(3)变阻器R2所消耗的最大功率P2。