适熟蚕
参考答案：
发育正常的蚕，到了5龄末期，食欲减退，体躯缩短，胸部透明，身体发软，并排出绿色软粪，前半身昂起，左右摆动。
Mr. Mao, who as a construction worker for over 8 years, is now a distinguished lawyer in this country.
A．has worked
B．had worked
C．worked
D．has been working
为减少氧化还原反应的可能性，预混料各原料的水分含量应不高于（）%。
