鉴别三种非典型苯丙酮尿症()
A.Guthrie细菌抑制生长抑制试验
B.尿三氯化铁试验
C.血浆游离氨基酸分析
D.尿嘌呤分析
E.DNA分析
参考答案:D
—Hello, Jack! Haven't seen you for a long time!
—Oh, John! __________? [ ]
A. How old are you
B. How are you
C. How is that
D. How time flies
发球员发球时向上抛球,又不准备击球而用手将球接住,不算失误。