单项选择题
乙丙橡胶可选择（ ）做增塑剂
A．环烷油
B．DBP
C．芳烃油
D．DOP
乙丙橡胶可选择（ ）做增塑剂
A．环烷油
B．DBP
C．芳烃油
D．DOP
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多项选择题
与下面代码片段等价的代码片段是
int k = 0;
while (k++ < 10) cout << "Now, k ＝ " << k << endl;
与下面代码片段等价的代码片段是
int k = 0;
while (k++ < 10) cout << "Now, k ＝ " << k << endl;
A．int k; for (k = 0; k <= 10; k++) cout <
B．int k; for (k = 0; k
C．int k; for (k = 0; k
D．int k; for ( k = 1; k <= 10; k++) cout <
单项选择题
The content of tongue observing covers ( ), etc.,
The content of tongue observing covers ( ), etc.,
A．tip and middle of tongue
B．margin and root of tongue
C．all of the above
D．none of the above