问题 单项选择题

51系列单片机40脚DIP封装的第17引脚功能是()

A、计数器0输入

B、计数器1输入

C、片外RAM写控制

D、片外RAM读控制

答案

参考答案:D

写句子

把下列句子先改写成“把”字句,再改写成“被” 字句。 

(1)人们称小草为大力士。 

                                                                                                        

(2)海风刮得梧桐树东倒西歪。

                                                                                                         

(3)狡猾的狐狸欺骗了凶恶的老虎。 

                                                                                                       

(4)他在操场上找到了丢失的钢笔。

                                                                                                        

(5)奇妙的猪笼草吃掉了一条蜈蚣。 

                                                                                                       

(6)齐着船舷的菜叶和垃圾填没了这只船和那只 船之间的空隙。 

                                                                                                       

(7)一辆马车无情地轧断了小珊迪的腿。 

                                                                                                       

(8)一大滴松脂滴下来,正好包住了一个苍蝇和一个蜘蛛。

                                                                                                        

(9)下了一场大雪,地里的害虫都冻死了。 

                                                                                                         

(10)母亲带小妹妹到儿童娱乐场去散步了。

                                                                                                        

单项选择题