题目内容

选词填空 (答案只填写选项字母,否则为零分)A. attainB. pursueC. raiseD. classifyE. especiallyF. fascinatingG. availableH. passionI. acquireJ. sampleK. fulfillL. qualifyM. virtuallyN. fashionableO. prosperousUniversity students come from different parts of the country with various purposes. However, a closer look at their reasons for studying at the university will enable us to 1.___them roughly into three groups: those who have a(n) 2.___for learning, those who wish to 3.___ a bright future, and those who learn with no definite purpose.Firstly, there are many students who learn simply because they 4.___their goal of learning. Some read a wealth of British and American novels because they are keenly interested in literature. Others sit in front of the computer screen, working on a new program, 5.___day and night, because they find some computer programs 6.___, and they dream of becoming a "Bill Gates" one day.Secondly, there are students who work hard mainly for a better and more 7.___ future. It seems that the majority of students fall into this group. After admission to the university, they read books after books to 8.___ knowledge from all of the resources which are 9.___ to them, and finally, to succeed in the future job market.Thirdly, there are still some students who learn without a clear goal. They take courses, finish homework, enjoy life on campus, but don't want to 10.___ anything new or challenging. They have no idea what they will be doing after college. And they may end up with nothing in their lives.

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STM32F103ZET6中哪个定时器不能输出PWM信号( )

A. TIM1
B. TIM3
C. TIM6
D. TIM8

STM32F103ZET6中定时器TIM3可以输出几路PWM信号()

A. 1
B. 2
C. 3
D. 4

如果采用TIM3的通道1,则该通道PA6引脚工作模式为( )

A. GPIO_Mode_IPD
B. GPIO_Mode_Out_PP
C. GPIO_Mode_AF_OD
D. GPIO_Mode_AF_PP

定时器TIM4输出频率为10KHZ的PWM信号,初始化设置参数()

A. PWM_Init(99, 7199)
B. PWM_Init(4999, 71)
C. PWM_Init(99, 71)
D. PWM_Init(4999, 7199)

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