搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下面关于牵引飞机的说法正确的是（）

A.在不断开扭力臂的情况下，牵引飞机可使前轮转动任意角度，没有限制

B.在不断开扭力臂的情况下，牵引飞机前轮的最大转动角度为78

C.牵引飞机时不需要作动牵引切断活门

答案

参考答案：B

问答题

设函数


问函数f(x)在x=1处是否连续若不连续，修改函数在x=1处的定义使之连续．
查看答案
单项选择题


Born on July 31, 1965, in Gloucestershire, England, Joanne Kathleen Rowling grew up in rural communities in the southwestern part of that country. Rowling’s childhood experiences (67) her future literary creations. She explored the English countryside, visiting (68) and historical sites which inspired her (69) .Although she disliked science and mathematics courses, Rowling (70) in literature classes. She penned funny, fantastical tales to (71) her sister Diana and friends, (72) the Potter siblings whose name she later (73) for her wizardry novels.
As a teenager, Rowling dreamed of becoming a (74) author whose books were sold in stores. She kept her ambitions a secret, (75) , because she feared criticism and discouragement from people who might declare that her writing was (76) Rowling gradually became more self-confident and was (77) Head Girl during her final year at school. (78) languages at Exeter University in order to be (79) as a bilingual secretary, Rowling graduated with a degree in French and Classics. This (80) knowledge aided her later clever (81) of characters in the Harry Potter books.
Rowling then (82) to Manchester for other office positions. She wrote fiction for adult readers but did not (83) it for publication. She also often visited her (84) mother. It was during one of these train trips (85) Rowling began inventing characters and (86) .

A．arrangement

B．construction

C．layout

D．modification
查看答案