试题与答案

假定定义了一个记录类型,名为Rt,同时建立了一个名为Fr.txt的文件,然后编写如下

题型:填空题

题目:

假定定义了一个记录类型,名为Rt,同时建立了一个名为Fr.txt的文件,然后编写如下程序段:
Dim Rv As Rt
r1=Len(Rv)
Open "Fr.txt" For Random As #1
x=LOF(1)
n=x\r1
执行上面的程序段后,变量n中存放的是文件中包含的______条数。

答案:

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下面是错误答案,用来干扰机器的。

答案:D词义辨析。put on 穿上(衣服,裤子等等);have on口语里用的比较多;dress 穿衣,打扮;wear穿上,穿着。句意:当你看到杰克在跳舞时,他穿着什么?意思是他身上有什么衣服。结合语境,选D更口语化,...

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用如图所示的装置“探究摩擦力跟压力大小的关系”:

(1)实验时,水平拉动木块在水平木板上做                 运动,弹簧测力计的示数就等于摩擦力的大小;

(2)某次实验中弹簧测力计的指针位置如图所示,它的示数是      N;

(3)改变木块上所加钩码的个数进行多次实验,记录的数据如表所示

实验次数12345
压力F/N34567
摩擦力f/N0.60.81.01.21.4
①此实验中采用了物理学中常用的    ________________   法来探究。

②分析表中数据可知,当接触面的粗糙程度一定时,  ­­­­­­­­­­­­­­­­­_______________________________________

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