【判断题】Collins 试剂是指 铬酸吡啶盐 ( )。
【判断题】Collins 试剂是指 氯铬酸吡啶鎓盐 ( )。
【单选题】线粒体基质中脂酰##o脱氢酶的辅酶是:()
【判断题】儿童的血液总量占体重的比例比成人小,年龄越小比例越小。
【单选题】已知全集U={1,2,3,4,5},集合A={1,3},B={3,4,5},则集合C U (A∩B)=( )
【单选题】He told us ________ sad and that it would be better for everyone.
【单选题】人体体液含量占体重的百分比,下列不正确的是
A.
成年男性占体重的60%,成年女性占体重的50%
【单选题】He told us not ________ sad, and that it would be better for everyone to keep calm.