黏滞性是指沥青在外力作用下抵抗变形的能力。沥青受到外力作用后表现的变形,是由于沥青中组分胶团发生形变或胶团之间产生相互位移。( )
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软化点越高,表明沥青的耐热性越好,即温度稳定性越好。( )
A. 对
B. 错
软化点是指沥青材料由黏塑状态转变为固体状态达到条件脆裂时的温度。( )
A. 对
B. 错
Given the following statement, which statement will write "Calvin" to the file DiskFile.txt?给定以下语句,哪个语句将“Calvin”写入文件DiskFile.txt?PrintWriter diskOut = new PrintWriter("DiskFile.txt");
A. System.out.println(diskOut, "Calvin");
B. DiskFile.println("Calvin");
C. PrintWriter.println("Calvin");
D. diskOut.println("Calvin");
When using the PrintWriter class, which of the following import statements would you write near the top of your program?使用PrintWriter类时,你需要在程序顶部附近写以下哪些语句?
A. import javax.swing.*;
B. import java.io.*;
C. import PrintWriter;
D. import java.file.*;