下边漫画启示我们要
A.量入为出,适度消费
B.紧跟潮流,贷款消费
C.保护环境,绿色消费
D.勤俭节约,艰苦奋斗
答案:D
He's been here for 10 years, _____?[ ]
A. is he
B. hasn't he
C. has he
D. isn't he
下列不属于果蔬原料变色原因的是()。
A.色素的转化
B.酶促褐变
C.非酶褐变
D.果蔬腐化