在进行嫁接时,接穗和砧木的 要紧密结合,以保成活。
形成层
根据句意和首字母完成下列单词。
1. J______ is the first month of a year.
2. She is very t_______, and she wants to drink some water.
3. Twenty-three and seventeen is f_______.
4. S______ points down on the map.
5. Mr Cheng is a waiter. He works in a r_______.
6. The last day of a week is S_______.
7. There are t_______ months in a year.
8. It's raining outside. You should take an u_______ with you.
9. Red t _______ light is stop. Green is go.
10. September tenth is T_______ Day.
背鳞外表面鳞片呈深棕色或黄棕色,密布 * * 状突起,乳突呈类三角形,类卵形或不规则形,内含颗粒状色素的药材是( )
A.蕲蛇
B.乌梢蛇
C.金钱白花蛇
D.蛤蚧
E.穿山甲