如何配制0.2摩尔/升邻苯二甲酸氢钾溶液?
参考答案:
称取40.836克邻苯二甲酸氢钾,溶于少量除盐水中,移入1000毫升容量瓶中,然后用除盐水稀释至刻度。
He usually gets up six o’clock Sundays.
A. at; on B. on; at C. at; at
下列程序段的执行结果为()。 a=2 b=0 Select Case a Case 1 Select Case b Case 0 Print " * * 0 * *" Case 1 Print" * * 1 * *" End selec Case 2 Print " * * 2 * *" End Select
A. Open"InfoBase.dat"For Output As #2
B. Open"d:\InfoBase.dat"For Output As #2
C. Open"d:\InfoBase.dat"For Input As #2
D. Open"InfoBase.dat",For Input As #2