【单选题】Why does Philips say that a writer should have a thick skin?
A.
Because it is hard for a writer to find a prospective editor.
B.
Because a writer may receive numerous rejections of his works.
C.
Because the rejection letters can be used to wallpaper the house.
D.
Because being a writer has something to do with luck and timing.
【判断题】当符号多项式中只有一个符号变量时,可以用sym2poly()函数将符号多项式转化为多项式系数向量的形式。
【判断题】当符号多项式中只有一个符号变量时,可以用sym2poly()函数将符号多项式转化为多项式系数向量的形式。A. √ B. ×
【简答题】下列各数的有效数字位数是 0.0030 0.698 6.023×1023 1000 .120 1.0×103 logKθ=11.23 pH=5.2
【简答题】下列各数的有效数字位数是 0.0030 位 0.698 位 6.023×10 23 位 1001 位 .120 位 1.0×10 3 位 log K θ =11.23 位 pH=5.2 位
【单选题】We get the impression that the writer of this article ______.
A.
bitterly criticizes the writing style. of e-mail
B.
is in favor of the writing style. of email
C.
does not express explicitly his own attitude towards the writing style. of email
D.
is strongly against the substandard writing style. of e-mail
【单选题】刀具磨损补偿应输入到系统( )中去。
A.
程序 B、刀具坐标 C、刀具参数 D、坐标系