叶一般腹面颜色深,背面颜色浅,是因为上表皮细胞含叶绿体多。
参考答案:错
—How long ________you ________Kate?
—For two years.
A.have ;been married to
B.have ;got married
C.did ;marry
应做腹膜后淋巴结清扫的是()
A.精原细胞瘤
B.睾丸胚胎癌
C.睾丸间质细胞瘤
D.睾丸恶性淋巴瘤
E.睾丸转移癌