[Objective]To detect the water content,total ash content and acid insoluble ash content in the roots of Tetracera asiatica,as well as the content of extracts.[M
例1 (1)我国第一艘航母“辽宁舰”在某次舰载机起降飞行训练中,有5架“歼-15”飞机准备着舰,如果甲、乙两机必须相邻着舰,而丙、丁两机不能相邻着舰,那么不同的着舰方法数是 . (2)从6人中选4人分别到湖北的武当山、大九湖、三峡人家、恩施大峡谷四个景点游览,要求每个景点有一人游览,每人只游览一个景点,且这6人中甲、乙两人不去武当山游览,则不同的选择方案共有( )种. A. 300种 B. 2
Brain integrity and cognitive aptitude are often impaired in patients with diabetes mellitus, presumably a result of the metabolic complications inherent to the