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【简答题】
C++17中，构造路径对象正确的代码是 A. namespace fs=std:filesystem; fs::path b{"C:/Users"}; b = b / "cyd"; B. std::filesystem::path r{"C:\\Windows"}; r.append("System32"); C. std::filesystem::path r{"C:\Windows"}; r += "System32"; D. std::filesystem::path p{"/home"}; r += "cyd"; E. using fs=std:filesystem; fs::path p {"/home"}; p /= "cyd";
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【单选题】—Excuse me, must I finish my homework now? —No, you _______. You can hand it in tomorrow. [ ]
A.
mustn't
B.
needn't
C.
shouldn't
D.
wouldn't
【单选题】阅读下面求质数的程序 import java.lang.Math.*; public class MorePrimesTest{ public static void main(String[] args){ long[] primes=new long[20]; primes[0]=2L; primes[1]=3L; long number=5L; outer: for(int count=2;...
A.
%
B.
&
C.
*
D.
/
【简答题】My money__________.I must go to the bank to draw some of my savings out before I’ve none in hand. A．has run out B．is running out C．has been run out D．is being run out
【单选题】My money ______. I must go to the bank to draw some of my savings out before I’ve none i n hand. [ ]
A.
has been run out of
B.
has been run out
C.
has run out
D.
is running out
【简答题】A035阅读下面求质数的程序 import java.lang.Math.*; public class MorePrimesTest{ public static void main( String [] args) { long [] primes = new long[20]; primes[0] = 2L; primes[1] = 3L; long number = 5L; outer: ...
【单选题】一台空载运行的三相异步电动机,当略微降低电源频率而保持电源电压大小不变时,电动机的励磁电流______,电动机转速为_______。
A.
不变/降低
B.
变大/降低
C.
变小/不变
D.
不变/不变
【单选题】阅读下面求质数的程序 import java.lang.Math.*; public class MorePrimesTest{ public static void main(String[] args){ long[] primes=new long[20]; primes[0]=2L; primes[1]=3L; long number=5L; outer: for(int count=2;...
A.
&
B.
*
C.
/
D.
%
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