氧的利用条件是什么?
参考答案:
抗生素产生菌只能利用溶解于培养液中的氧。通入发酵罐中的氧并不能全部溶解于培养液中,故抗生素产生菌仅利用通入氧的极小部分。
窗体上有一个命令按钮,命令按钮的单击事件过程如下。运行程序后,单击命令按钮,输出结果是 Private Sub Command1_Click( ) Dim a a = Array(1,2,3,4,5) For k = 1 To4 s=s+a(k) Next Print SEnd Sub
A.10
B.14
C.15
D.120
Half of his money ___ in the "found and lost case". [ ]
A. has found
B. have found
C. was found
D. were found