Mr. Li is the present ______ of the presidential chair of the company.
A. transaction
B. prescription
C. professor
D. incumbent
—Have you __________ been to Beijing—No, never.
A. just
B. ever
C. yet
He was present in his ______ role of school manager, church warden and donor.
A. dedicated
B. triple
C. providential
D. religious
有以下程序: #include<iostresm.h> void main() int n; cin>>n; if (n++<10) cout<<n<<endl; else cout<<n--<<endl; 若执行上述程序时,从键盘上输入9,则输出结果是( )。
A. 11
B. 10
C. 9
D. 8