皮皮学,免费搜题
登录
搜题
【单选题】
What should you call your father's mother?
A.
aunt
B.
grandmother
C.
mother-in-law
D.
great-grandmother
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【简答题】试求下列函数的拉氏变换. (1)f(at-b)u(af-b); (2)e-tu(t-1).
【判断题】所有型号摄像机上的色温条件都一致。
A.
正确
B.
错误
【单选题】车站技术管理和作业组织应在( )中规定。
A.
《技规》
B.
《调规》
C.
《行规》
D.
《站细》
【单选题】已知数列{a n }既是等差数列又是等比数列,则这个数列的前n项和为 [     ]
A.
n
B.
na 1
C.
a 1 n
D.
0
【简答题】《安规》规定,凡在距离地面()m以上的处所进行作业,均称为接触网高空作业。
【简答题】You (stand)______ several feet away if you wish to get the full effect of the picture.
【单选题】Part 2 task1 Passage1, question2:
A.
Richard lent some money to Michael
B.
Michael helped Richard build his house
C.
Michael invited Richard to fly kites
D.
Richard set fire on Michael's house
【单选题】Part 2 task2 Conversation1, question1:
A.
Because she was ill
B.
Because she was not hungry
C.
Because her car was stolen
D.
Because she just had her lunch
【单选题】已 已知 f(t)=e at ,(a 为实数 ) ,则f(t)的积分的拉氏变换为
A.
a/(s-a)
B.
1/[a(s+a)]
C.
1/[s(s-a)]
D.
1/[a(s-a)]
【单选题】已知数列{a n }的前n项和S n =q n -1(q∈R,q≠0),则数列{a n }(  )
A.
一定是等差数列
B.
一定是等比数列
C.
或者是等差数列或等比数列
D.
既非等差数列又非等比数列
相关题目: