Which of the following commands is used to view the current process of the system()
A. rm
B. touch
C. mkdir
D. ps
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介观世界的尺寸范围1 nm到()nm
A. 10
B. 100
C. 10000
D. 100000
Which of the following is not included in the GNU toolchain()
A. GCC
B. GDB
C. LD
D. IDE
When compiling a program with gcc, which of the following opens all warnings()
A. -w
B. -O
C. -g
D. -Wall
采用新方法测量铁含量时得到8个数据,采用t检验法计算得到的t值是1.67,而选定显著性水平为0.05时查表得到的t值是2.31,采用新方法是否引起了系统误差()
A. 没有
B. 是
C. 不能判断
D. 可能