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【单选题】
人们常常利用顺口溜、歌诀等来帮助自己记忆一些材料,这种记忆方法是( )。A.
地点记忆法
B.
歌诀记忆法
C.
特征记忆法
D.
直观形象记忆法
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【单选题】Great writers are those who not only have great thoughts but also express these thoughts in words which appeal ______ to our minds and emotions.
A.
forcefully
B.
greatly
C.
strongly
D.
powerfully
【单选题】The most outstanding local colorist writers of 19th century America is ______, whose The Adventures of Huckleberry Finn has been exerting great influence on later generations.
A.
Mark Twain
B.
Henry James
C.
Washington Irving
D.
James Fennimore Cooper
【简答题】TCP/IP模型由低到高四个层次分别为网络接口层 _____ 、_____ 和应用层。
【简答题】TCP/IP 模型由低到高分别为 网络接口层、 ____________ 、传输层、 ____________ 。
【单选题】设X1，X2，…，Xn是来自总体X的样本，Ai为i阶原点矩，Mj为j阶中心矩，下列关于样本矩的关系式中哪一个是错误的？
A.
A1=X ̅
B.
M2=A2-A1^2
C.
(n-1)S^2=nM2
D.
S^2=A2-A1^2
【单选题】China has produced many great writers over the last ten years, ____ Mo yan.
A.
among them was
B.
among whom was
C.
in which was
D.
among whom were
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