______ theories approximate the truth is the day-to-day business of science.
A. Determining how closely
B. How closely to deternmine
C. How one determines close
D. One is close to determining
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The problem now is______ we can adopt to overcome the difficulties in shortage of funds.
A. what measure
B. that measure
C. measure that
D. measure which
______that snow men were often spotted on the mountainside above 7000 meters by the local inhabitants.
A. It was used to be saying
B. It used to be said
C. It used to say
D. It was used to saying
要创建一个新目录，可以用下面( )类实现
A. Fille
B. FileOutputStream
C. PrintStream
D. FilleInpuStream
判断文件或文件夹（文件夹也叫做目录）方法
A. isDirectory()
B. isFile()
C. exists()
D. isAbsolute()
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