热力环流的形成过程为（    ）

①近地面空气受热或冷却  ②同一水平面上产生气压差异

③形成大气的水平运动    ④气流的上升或下降运动

根据下列句子所给的提示及句意，写出句子空缺处各单词的正确形式。
1.I never feel ____ (无聊的) or unhappy when he is with me.
2.He lives____ (独自), so he often feels ____(寂寞).

3.This dress is very popular this year. Do you know who the____ (design) is?
4.He didn't ____(出现) until ten o’clock last night.
5.They are having an ____ (采访) with Mr. Green about the changes in his hometown.
6.Traveling____(到国外) has become fashionable.
7.The castle looked____ (shine)and beautiful under the fireworks.

关于免疫活动，下列属于特异性免疫的是（　　）