【单选题】They’re late. The film _____ for 5 minutes.
【简答题】A.She has been studying late into night all week. B.She has made plans to work late all week. C.She has not been free to go out with Abruzzi all week. D.She has been busy tidying up her apartment all ...
【简答题】下面程序的功能是求出用数字0至9可以组成多少个没有重复的三位偶数。请填空。 #include main() { int n,i,j,k; n=0; for(i=1;i<=9;i++) for(k=0;k<=8; 【1】) if(k!=i) for(j=0;j<=9;j++) if( 【2】) n++; printf(“n=%d\n”,n); }
【单选题】They’re late. The film _______ for half an hour.
【单选题】They are late. The film __________ for five minutes.
【单选题】No one except two students ______ the meeting. a. has been late for b. have been late for c. was late for d. were later for
【多选题】气相色谱分析法在药品质量分析中的应用包括( )
C.
酊剂(如藿香正气水、十滴水等)中甲醇、乙醇含量测定