.You’ll never guess who I met today—my old teacher! We_____for twenty years.

A．don’t meet

B．haven’t met

C．hadn’t met

D．couldn’t meet

下述哪项不属于小儿脂肪缺乏时的临床表现

A．食欲缺乏 

B．体重不增 

C．皮肤干燥易于脱屑，容易感染 

D．容易发生脂溶性维生素缺乏 

E．容易腹泻、消化不良