引发特发性肺间质纤维化的原因是:
A．原发肿瘤
B．继发肿瘤
C．感染
D．吸人有害物质
E．不明原因
参考答案：E
The school isn't the one I really wanted to go to，but I suppose I'll just have to ________ it.
A．make the best of
B．get away from
C．keep an eye on
D．catch up with
支链氨基酸的英文缩写是（）
A.BCAA
B.BEE
C.TPN
D.MCT
E.TNA
