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【单选题】
The Oral Approach originated with the work of______ linguists.A.
British
B.
American
C.
Japanese
D.
German
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举一反三
【简答题】已知公差d不为0的等差数列{a n }中，a 1 =1，且a 1 ，a 3 ，a 7 成等比数列． （1）求通项a n 及前n项和S n ； （2）若有一新数列{b n }，且b n = 1 a n a n+1 ，求数列{b n }的前n项和T n ．
【简答题】在公差为 d 的等差数列{ a n }中，已知 a 1 ＝10，且 a 1, 2 a 2 ＋2,5 a 3 成等比数列． (1)求 d ， a n ； (2)若 d <0，求| a 1 |＋| a 2 |＋…＋| a n |.
【简答题】S1:When security level 2 or 3 is get by the port facility you are visiting and the information was communicated to you ,what should you do on board?S2:According to the ISPS code ,I shall acknowledge t...
【简答题】苗语属于( )语系( )语族的( )语支的语言。
【单选题】You are kindly requested to supply the necessary tallymen to do ______ on board the ship during the discharging of the cargo.
A.
the tallymen work
B.
the lashing work
C.
the cleaning work
D.
the work of opening and closing hatches
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