A:who was it that killed
B:who it was that killed
C:it was who killed
D:who was it killed
在探究“检测不同环境的细菌和真菌”,实验前不要盲目的打开培养皿,使它们保持密封状态的目的是:防止细菌或真菌及其____落在培养基上,在实验中,用无菌棉棒的目的是:防止其他____污染培养基.
所谓权力清单制度,就是政府及其部门在对其所行使的公共权力进行全面梳理的基础上,依法界定每个部门、每个岗位的职责与权限,然后将职权目录、实施主体、相关法律依据、具体办理流程等以清单方式进行列举和图解,并公之于众。该制度产生影响的传导路径是( )