Jack is an egg-head.中的egg-head是什么意思?

Jack is an egg-head.中的egg-head是什么意思? Is this an egg? He is an egg on his head now.要加动词put,该怎样填 This is ----- egg.can Ieat------ egg?an,an an,the is this an apple an orange__an egg look,there is 这里选a egg还是is egg还是an egg?inthe box. That is an egg 改为复数句 That is an egg in English. That is an egg (改为否定句) this is（ ）egg .( ) egg is Tom'sA.an.an B.an.the This is () egg.() egg is big.A :a AB:an AnC:an The Jack is an English boy. a egg还是an egg There is a pencil There is an egg. There is no _.A egg B eggs C an egg 为什么选B? This is an egg (改为复数形式） there is an egg hunt at the church翻译 It is an egg变为复数形式怎么改