There are 4 I/O ports in 8051 MCU. In these ports, P has No Pull-up register in it.

latch与register的区别，为什么现在多用register？

If the storage type of a variable is , the compiler allocates memory only when the variable is referred?? register or static|extern or register|auto or register|auto or static

to register

instruction register

Assume the BC register value is 8538H, and the DE register value is 62A5H.Find the value of register BC after the following assembly operations: MOV A,C SUB E MOV C,A MOV A,B SBB D MOV B,A

RS0 and RS1 are ( ) A: not<br/>a part of the PSW as these are not the flags B: part<br/>of the register bank C: PS4<br/>and PSW.5 respectively for selecting the register bank in the PSW D: PS3<br/>and PSW.4 respectively for selecting the register bank in the PSW

在C语言中，只有在使用时才占用内存单元的变量，其存储类型是（ ）。 A.aut0和register B.extem和register C.auto和static D.static和register

在C语言中，（）存储类型的变量，只在使用时才分配空间。 A: static和auto B: register和extern C: register和static D: auto和register

【单选题】假设web运行时根目录url为:http://localhost:8080/jsp2019,下面配置信息表示将ch10包中的RegisterServlet类映射后的url路径为() register ch10.RegisterServlet register /register/reg A. http://localhost:8080/jsp2019/reg.jsp B. http://localhost:8080/jsp2019/reg C. http://localhost:8080/jsp2019/register/reg D. http://localhost:8080/jsp2019/register/reg.jsp