检验检疫机关对已建立完善的卫生控制措施的从事疫区来货的企业,采取对其每次入境的疫区来货减少在口岸的查验次数,加快通关速度的便捷方法。()
参考答案:对
I didn't know _____ yesterday.[ ]
A. why isn't Danny in school
B. why wasn't Danny in school
C. why Danny isn't in school
D. why Danny wasn't in school
已知5%葡萄糖溶液的渗透压与动物血浆渗透压基本相同,现给正常小鼠静脉输入一定量的该葡萄糖溶液,葡萄糖溶液的输入对小鼠会有一定影响。回答下列问题:
当细胞外液渗透压发生变化时,细胞内液的渗透压()(填“会”或“不会”)发生变化。