PLC系统管理程序的功能不包括:()
A.时间分配的运行管理
B.存储空间的分配管理
C.系统的自检程序
D.系统程序的编译
参考答案:D
人长时间运动后,产生渴觉的原因是[ ]
A.血浆CO2浓度升高
B.血浆乳酸浓度升高
C.血浆渗透压升高
D.血糖浓度升高
Nathan , studying abroad, was _____ to see his friend off at the airport.
A.a little more than sad
B.sad more than a little
C.more than a little sad
D.a little more sad than