1、【题目】Allherhardwork__________intheend,andshefinallypassedtheexam.
选项:
A.showedoff
B.paidoff
C.1eftoff
D.keptoff
答案:
解析:
1、【题目】Applicants should note that all positions are —— to Australian citizenship requirements .
选项:
A.subject
B.subjective
C.objected
D.objective
答案:
A
解析:
暂无解析
1、【题目】设数列 {an} 的前 n 项和为 Sn,则 {an} 等差。
(1) S n4=n 2+2n, n=1,2,3
(2) S n4=n 2+ 2n +1,n=1,2,3
选项:
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来也不充分.
答案:
A
解析:
等差数列的前n项和公式为Sn=An2+Bn,A、B为全体实数,因此条件(1)充分,条件(2)不充分,选A。
1、【题目】Itisestimatedthat,currently,about50,000speciesbecome_____everyyear.
选项:
A.extinct
B.instinct
C.distinct
D.intense
答案:
解析:
1、【题目】The destruction of the twin towers _________shock and anger throughout the world .
选项:
A.summoned
B.tempted
C.provoked
D.stumbled
答案:
C
解析:
暂无解析
1、【题目】Inordertolivethekindoflifewewantandtobethepersonwewanttobe,wehavetodomorethanjust________withevents.
选项:
A.putsup
B.setup
C.turnup
D.makeup
答案:
解析:
1、【题目】The opportunity to explore and play and the encouragement to do so Can ________the performance of many children .
选项:
A.withhold
B.prevent
C.enhance
D.justify
答案:
C
解析:
暂无解析