3—硝基丙酸常见于下列哪种食物霉变后产生的真菌毒素______。
A.玉米
B.小麦
C.花生
D.甘蔗
E.水果
参考答案:D
107. The Curies are best known for ____ radium and they won the Nobel Prize in 1903.
A.discovering
B.inventing
C.finding
D.Creating
柴油机工作时,曲柄连杆机构主要受哪些力?