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【单选题】
广义平稳的过程通过线性系统,输出为( )随机过程。A.
平稳
B.
平稳
C.
平稳非
D.
以上都不是
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举一反三
【单选题】The manager says he really can’t ______to wait another day, because he is so busy.
A.
afford
B.
waste
C.
spend
D.
cost
【单选题】He is so busy that he can’t ________ the services of a secretary.
A.
do without
B.
set down
C.
make for
D.
touch on
【单选题】要查询xsh数据库cp表中产品名含有“冰箱”的产品情况,可用( )命令
A.
select * from cp where 产品名称 like '冰箱'
B.
select * from xsh where 产品名称 like '冰箱'
C.
select * from cp where 产品名称 like '%冰箱%'
D.
select * from cp where 产品名称='冰箱'
【单选题】The manager says he really can't _____ to wait another day, because he is so busy．
A.
waste
B.
afford
C.
spend
D.
cost
【单选题】要查询XSH数据库CP表中产品名含有“冰箱”的产品情况,可用( )语句。
A.
SELECT * FROM CP WHERE 产品名称 LIKE ‘冰箱’
B.
SELECT * FROM XSH WHERE 产品名称 LIKE ‘冰箱’
C.
SELECT * FROM CP WHERE 产品名称 LIKE ‘%冰箱%’
D.
SELECT * FROM CP WHERE 产品名称=‘冰箱’
【单选题】He was so busy that he couldn’t help ____________ the experiment.
A.
doing
B.
do
C.
did
D.
done
【单选题】As he ______ to his work that he didn't notice that it was already past midnight. [ ]
A.
was so busy
B.
so devoted
C.
was so devoted
D.
was so turned
【单选题】要查询XSH数据库CP表中产品名含有“冰箱”的产品情况，可用（ ）命令
A.
SELECT * FROM CP WHERE 产品名称 LIKE ‘冰箱’
B.
SELECT * FROM XSH WHERE 产品名称 LIKE ‘冰箱’
C.
SELECT * FROM CP WHERE 产品名称 LIKE ‘%冰箱%’
D.
SELECT * FROM CP WHERE 产品名称=‘冰箱’
相关题目：
【单选题】He was so busy that he couldn’t help ____________ the experiment.
A.
doing
B.
do
C.
did
D.
done
参考解析：
知识点：
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