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【单选题】
PHP提供了fopen()函数,下列描述错误的是()。A.
fopen()函数用于打开文件。
B.
fopen()函数的第1个参数指定打开的文件，可以是http开头的网络URL地址。
C.
fopen()函数的第2个参数表示打开文件的模式。
D.
fopen()函数的第2个参数可以省略，默认是“r”模式。
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A.
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B.
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D.
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【单选题】溶液中氢离子浓度以pH来表示,可采用下列哪种表达式?( )
A.
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B.
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C.
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D.
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A.
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B.
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C.
should
D.
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A.
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B.
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C.
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D.
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【简答题】各位同学,请在资料文件夹里面下载实验6的素材,并根据排版要求,对表格案例进行相应的操作,操作完了以后请将与实验要求无关的内容删除,并经所有的内容姓名—+文件夹的形式提交附件。
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