则以下叙述中正确的是 ______。
A．记录类型animal不能在Form1中定义，必须在标准模块中定义
B．由于Put命令中没有指明记录号，因此每次都把记录写到文件的末尾
C．Open "c：\vb Test.dat"For Random As # 1 Len=Len(reC)
D．语句"Put # 1，，rec"将animal类型的两个数据元素写到文件中
E．如果文件c:\vbTest.dat不存在，则Open命令执行失败
参考答案：D
解析：[评析] 记录类型可以在标准模块中定义，也可以在窗体模块中定义。如果文件c:\vbTest.dat不存在，Open命令是可以执行的；随机访问模式中文件的写操作使用Put命令，其形式如下：Put[#]文件号，[记录号]，变量名。其中：记录号是大于1的整数，表示写入的是第几条记录；如果忽略记录号，则表示在当前记录后插入一条记录。
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| What is the best way to study? This is a very important question. Some Chinese students often 1 very, very hard for long hours. This is a 2 , but it is not a better way to study. An efficient (有效率的) student must 3 enough sleep, enough food and enough rest. Every 4 you 5 to 6 your studies, you'll find yourself stronger than before and you'll learn more. Perhaps we can 7 that learning English is 8 taking Chinese medicine. We don't mean that it's bitter (苦). We mean that like "Chinese medicine, the efficiency (效率) of your study 9 slowly but surely 10 lowly, Slowly every day and effects will come just like Chinese medicine." | ||||
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