如下错误如何解决?谢谢! , i0 j1 V. ^. d! yC:\Keil\ARM\Inc\ST\STM32F10x\stm32f10x.h(96): error: #35: #error directive: "Please select first the target STM32F10x device used in your application (in stm32f10x.h file)" 4 C m) n- D% K/ j+ y#error "Please select first the target STM32F10x device used in your application (in stm32f10x.h file)"* `# Y' ^+ n9 F8 y; ?9 E5 `, x