比较有针对性、且易于反馈的社区健康教育形式是（）。
A.个别教育
B.群体教育
C.文字教育
D.电化教育
E.形象教育
参考答案：A
用所给单词的适当形式填空。
1. It's not easy__________(be) the new kid at school.
2. Thanks very much for__________ (invite) me to your house last night.
3.I don't feel like__________ (eat) anything today.
4. My grandmother is going to have her__________(ninety) birthday party.
5. He always makes things much__________(easy) to do.
6. Why don't you__________(get) her a nice scarf as a birthday present?
7. I think the watch as a birthday present is too__________(person).
8. This is perhaps the best gift that I have ever__________(receive).
9. This skirt, is too big. Would you mind showing me a__________(small) one?
10.I tend to get__________(annoy) when someone interrupts me while I'm having a pleasant talk with
others.
500kV单回路架空送电线路，4分裂相导线，导线分裂间距450mm，三相导线水平排列，间距12m，导线直径为26.82mm。
线路的波阻抗Zc=250Ω，请计算线路的自然功率最接近下列何值？（）
A.1102.5MW
B.970.8MW
C.858.6MW
D.1000.0MW
最接近下列何值？（）