Matt is now getting on very well with his new job and he earns ______ he did last year．

A．twice as much as

B．as twice much as

C．twice as many as

D．as twice many as

寄生虫哪些抗原成分可诱导变态反应（）？

A.仅有线虫的蜕皮液

B.仅有绦虫的囊液

C.仅有代谢产物

D.仅有表膜和虫体内抗原

E.A、B、C、D全部