顺次连接任意四边形各边中点的连线所成的四边形是（ ）。
平行四边形
根据首字母和汉语提示填入所缺单词。
1. Do you have an E______ name ?
2. He often does his homework i______ the evening.
3. —Can you s______ your name? —Yes, I can. F-R-A-N-K, Frank.
4. Stand up, p______.
5. W______color is your new ruler?
按一级动力学消除的药物其消除半衰期
A．随用药剂量而变B．随给药途径而变C．随血浆浓度而变D．随给药次数而变E．固定不变
