There are two character strings：s and t.s="My favor is computer"，t=substr(s，9，5)．Then the result after operation is

A．S="My favor is computer"； t="compu"；

B．S="My favor is computer"； t="is co"；

C．S="My favor"； t="is co"；

D．S="My favor"； t="is computer"；

[单选题]设计每吨尿素产品消耗S38（）T.A . 1.52B . 1.62C . 1.53

[单选题]逻辑常量A=.T.、B=.T.、C=.T.，下面各表达式中返回逻辑真的是（）A . NOT（（NOTAORB.ANDC.B . NOT（NOT（AORB.ANDC.C . NOT（AANDBORNOTC.D . NOT（NOTAORBANDC.

[单选题]PULL THE STRINGS AROUND YOUR WAIST AND TIE IN FRONT. This description is likely used in（）.A . fire fighting operationsB . salvage operationsC . cargo operationsD . manoeuvering operatio

[单选题]有程序：CHARACTER*6SS=‘ABCDEF’CALLSS（S）ENDSUBROUTINESS（S1）CHARACTERS1*3WRITE（*，*）S1END此程序执行后的输出结果为：（）A . ABCB . BCDC . CDED . DEF

[试题]S：Two yuan．S： 60

[单选题](程序)SET TALK OFFC．LEARSTORE .T. TO XSTORE 0 TO YD．O WHILE XY=Y+1IF INT(Y/5)= Y/5?? YE．LSELOOPE．NDIFIF Y＞15STORE .F. TO XE．NDIFE．NDDOSET TALK ONRETURN第一次输出Y值为 ______。A．5B．6C．7D．8

[单选题]如果用T代表公差范围，用T.代表公差上限，用T.，代表公差下限，如果分布中心与公差中心重合，则工序能力指数的计算公式为（ ）。A．T./6sB．Tl，/6SC．T/6SD．（Tu-T1.）/6S

[单选题]下列函数结果为.T.的是A．EMPTY(SPACE(5) )B．EMPTY(.NULL.)C．ISNULL(")D．ISNULL({})

[单选题]An analyst wants to compare the cash flows of two U.S. companies, one that

[问答题]设向量组（Ⅰ）α1，α2，…，αs．（Ⅱ）β1，β2，…，βt．（Ⅲ）α1，α2，…，αs，β1，β2，…，βt．的秩依次为r1，r2，r3.证明:m