n个顶点的有向图G用邻接矩阵A[1..n,1..n]存储,其第i列的所有元素之和等于顶点Vi的_______。
参考答案:入度
句型转换.
1. She said,"I will have a birthday party for Li Hua."(改为间接引语)
She said _________a_________ _________ _________a birthday party for Li Hua.
2. Tom said,"I go to the supermarket every Sunday."(改为间接引语)
Tom said__________ _________ to the supermarket every Sunday.
3.What a heavy snow!(用how来改写感叹句)
__________ _________the snow is !
4. "Sit down," the teacher told me.(改为间接引语)
The teacher________ _________ _________ sit down.
5. He is watching TV now.(用al five yesterday afternoon来替换时间状语)
He__________ ________ ________ at five yesterday afternoon.
抑制磷酸二酯酶,减少cAMP的降解而使cAMP增多的药物是
A.二丙酸氯地米松
B.异丙阿托品
C.氨茶碱
D.异丙肾上腺素
E.特布他林