在PowerPoint 2003幻灯片中插入______图,可以描述一个部门的人事结构,或一个系统的层次结构。
参考答案:组织结构
短文改错。
This morning I got up early and went to school as usually, only to find there were nobody in the
classroom because it is Sunday. "How a bad memory I have!" I couldn't help laughing. Stand in
front of the school gate, I began to wonder what to do next. Suddenly a good idea occurs to me.
"Why not get together with some good friends for a picnic in such a fine weather?" I immediately
telephoned some of my best friends, but they all agreed to join me. About two hours late, we finally
arrived a pleasant park with trees and flowers here and there. We really enjoyed us greatly.
长期使用会造成牙色素沉积的药物牙膏是
A.“全效”牙膏
B.洗必泰牙膏
C.脱敏牙膏
D.氟化亚锡牙膏
E.增白牙膏