1, 3, 5, 7, etc., are odd.(英译中)
第1题
第二节 书面表达
一些美国朋友要来参加你们班举办的英语晚会。作为主持人,你需要用英语准备一份60~80个单词的欢迎辞。欢迎辞必须包括以下提示的内容(开头已给出):
(1) the number of students(50 students)
(2) what you think of English
(3) how you learn English in your free time (magazines, TV, radio, tape, etc.)
(4) your English programmes (plays, songs, dances, etc.)
(5) ending(结束语)
第2题
已知δt(t=1,2,…)服从AR(2)过程,且其均值为0.08,另有如表8-3的数据.计算δ5的估计值.
表8-3 | ||||
Z | 1 | 2 | 3 | 4 |
delta _Z^A(实际值) | 0.100 | 0.110 | 0.090 | 0.095 |
delta _Z^E(估计值) | 0.086 | 0.094 | 0.102 | 0.092 |
第3题
写出下面算法中带标号语句的频度。 TYPE ar=ARRAY[-1…n]OF datatype; PROCEDURE perm (a:ar;k,n:integer); VAR x:datatype;i:integer; BEGIN (1)IF k=n THEN BEGIN (2)FOR i:=1 TO n DO (3)write (a[i]); writen; END ELSE BEGIN (4)FOR i:=k TO n DO (5)a[i]:=a[i]+i*i; (6)perm(a,k+1,n); END END 设k的初值等于1。
第4题
请指出下列各组中半径最小的原子或离子: (1)Li,Na,K; (2)P,As,Bi; (3)O+,O,O-; (4)S,Cl,Ar; (5)Pd,Ni,Cu
第5题
第6题
Write an email to the above email address, 1)expressing your interest in the course; 2)asking about class size,materials for use,trainer information,etc. You should write about 100 words.Do not sign your own name at the end of your email. Use“Wang Lin”instead.
第8题
审证:指出信用证中错误的地方、我方做不到或应注意的地方。
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