【判断题】二乔玉兰是白玉兰与紫玉兰的杂交种,较原种更耐寒,耐旱。
【判断题】二乔玉兰是白玉兰与紫玉兰的杂交种,较原种更耐寒,耐旱。
【简答题】A.They think it useful. B.They think it valueless. C.They think it a waste of time. D.They think it misleads the students.
【简答题】A.To keep it longer. B.To give it a particular taste. C.To make it rougher. D.To fasten the process.
【简答题】A.To preserve it longer. B.To give it a particular taste. C.To make it smoother. D.To increase tire fermentation.
【多选题】在常温下,下列哪几种酸味剂是固体状的( )。