对人而言,HLA抗原属于()
A.异种抗原
B.改变的自身抗原
C.隐蔽抗原
D.同种异型抗原
E.肿瘤相关抗原
参考答案:D
解析:HLA是人白细胞抗原,对人而言是同种异型抗原。
So far this year we __________ a rapid rise in food prices by between 10 and 20 percent.
A.experience
B.had experienced
C.experienced
D.have experienced