名义接触面积
包装
You enable the Windows Sidebar feature on your computer. You discover that you are unable to access the desktop icons that appear beneath the Windows Sidebar feature. You need to access these desktop icons. What are two possible ways to achieve this goal?（） ["A","B","C","D","E"]
关于微核的描述不正确的是（） ["实质是DNA","是丢失的染色体片段","存在于细胞核中","存在于细胞质中"]
（）数据库系统是物理上分散而逻辑上集中的数据库系统。 ["分布式","集中式","分布集中式","虚拟式"]
简述氨与二氧化碳生产尿素的工艺？
