The Maoris usually_______ when they meet each other.
A. kiss each other on cheeks
B. press their nose
C. pat on the back
D. bow to each other
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People all around the world are changing their way of greetings to reduce the risk of contacting corona virusand prevent it from spreading except _______________.
A. hug each other
B. footshaking
C. elbow bump
D. kiss each other
MATLAB变量命名规则中,变量名必须以()开头。
A. 数字
B. 字母
C. 下划线
D. 特殊符号
下列MATLAB命令中,表示一次创建多个符号变量是哪个选项?
A. sym a
B. syms a b x y
C. sym(‘x’)
D. sym(‘x y z’)
MATLAB,命令:factor(F) 可以进行什么操作?
A. 将符号表达式F展开
B. 将符号表达式F化简
C. 将符号表达式F因式分解
D. 画图