【单选题】假设CNKI期刊数据库中共有某课题相关文献为100篇,而只检索出来相关文献60篇,那么_____就等于60%。
【单选题】十进制数 67 转换成二进制数是______。
【简答题】Watch Part 2 and match the statements.
【单选题】He invited me to take part in the football game, but I _____ watch it. [ ]
【单选题】Watch the second part (1.28– 2.26) of the talk again. Which sentence (a–e) is not true?
A.
a.163 people wrote down a personal goal.
B.
b.Half of them announced their commitment to this goal to the others, and half didn’t.
C.
c.Everyone was given tasks to help them towards their goal.
D.
d.The people who didn’t announce the goal worked for longer than the people who did announce the goal.
E.
e.The people who announced the goal said they didn’t feel close to achieving their goal.
【简答题】三相桥式全控整流电路是由一组共 极三只晶闸管和一组共 极的三只晶闸管串联后构成的,晶闸管的换相是在同一组内的元件进行的。每隔 换一次相,在电流连续时每只晶闸管导通 度。要使电路工作正常,必须任何时刻要有 只晶闸管同时导通,一个是共 极的,另一个是共 极的元件,且要求不是 的两个元件
【单选题】经常存在着这种现象:当某力管理者在岗位上取得突出成就之后,就被提升到更高的职位 上,但是她并不具备从事这一职务的才能,这一现象被称为 ( )
【简答题】A.He will lake part in the chorus. B.He will join more activities. C.He will go to watch the chorus' performances. D.He will practice singing.