ADC256现场维修手册中写明副扫描方向上浓度不均可能引起原因的部件有()
A.成像单元
B.PH单元
C.转印带
D.以上都是
参考答案:D
多指(如六指)是由显性致病基因控制的一种常见畸形。如果父母双方的一方是多指(基因组成是AA或Aa)另一方正常,他们的子女会[ ]
A.都患多指或一半患多指
B.一半患多指, 一半正常
C.全部患多指
D.全部正常
What is the common opinion about age and work
A.Work gets a lot easier after the age of 40.
B.Most of one’s work is done before the age of 40.
C.There isn’t much work to do after the age of 40.
D.Work gets more difficult after the age of 40