【判断题】借贷记账法账户的基本结构是每一个账户的左方均为借方, 右边均为贷方。
【判断题】( )由于蜗杆的头数多,效率高,所以蜗杆的头数越多越好。
【单选题】Using the technique of electrophoresis to study sickle cell anemia, Pauling concluded that ( ).
A.
polypeptides carry the genetic information
B.
the sickle cell gene chemically alters the hemoglobin protein
C.
DNA carries the genetic information
D.
the one-gene-one-enzyme hypothesis was incorrect
【单选题】Which type of mutation leads to sickle cell anemia? Choose the one best answer.
【判断题】经质检部门鉴定不需要返修、可以降价出售的不合格品,不计入废品损失。( )(2017年)
【单选题】U s ing the technique of electrophoresis to study sickle cell anemia, Pauling concluded that ( ).
A.
polypeptides carry the genetic information
B.
the sickle cell gene chemically alters the hemoglobin protein
C.
DNA carries the genetic information
D.
the one-gene-one-enzyme hypothesis was in c orrect
【简答题】镰状细胞贫血( sickle cell anemia) :
【单选题】私人不愿充分提供公共产品是因为无法补偿( )
【判断题】借贷记账法账户的基本结构是每一个账户的左边均为借方,右边为贷。 ()
【判断题】锤击焊缝既可以减小焊接变形,还可以减小焊接残余应力。( )