339，516，236，729，428，（）。 A: 305 B: 311 C: 336 D: 339

155 248 339 （ ） A: 248 B: 414 C: 426 D: 428

在等比数列{an}中，a4=27，q=-3，则a7= （ ） A: 729 B: -729 C: 243 D: -243

以下哪段代码能把数值516以二进制的形式写入My文件中。 A: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Save(516); B: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.write(516); C: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Write(516); D: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.save(516);

以下哪段代码能把数值516以二进制的形式写入My文件中。 A: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Save(516); B: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.write(516); C: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.Write(516); D: BinaryWriter bw = new BinaryWriter(File.Open("My", FileMode.Create));bw.save(516);

求下列整数的素因子分解式。729

339 . 下列叙述正确的是

236 Which of the following fogs lasts the longest? _____ .

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电容器上标注“339”，其电容值是