A:H在甲中随水的分解而产生,而在乙中随水的生成而产生
B:甲通过类囊体叠加增加膜面积,乙通过内膜折叠增加膜面积
C:甲中不含有而乙中含有将二磷酸腺苷转变成三磷酸腺苷的酶
D:甲产物O2中O全部来自H2O,乙产物CO2中O全部来
根据句意,用所给动词的适当形式填空。(1)By the time he left college, he ____ (get) much working experience because of his part-time job.(2)John, like other children who have no parents,____ (take) good care of in our country.(3)We should wash hands properly ____ (fight) against H7N9 virus.(4)Look! There are so many kites____ (fly) in the sky.(5)If you want to improve your English, you should practice____ (speak) it as much as possible in and out of class.
如图,已知直角梯形ABCD的一条对角线把梯形分为一个直角三角形和一个边长为8cm的等边三角形,则梯形ABCD的中位线长为( )