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【简答题】
在考生文件夹下建立项目market。 (2)在项目market中建立数据库prod_m。 (3)把考生文件夹中自由表category和products加入到prod_m数据库中。 (4)为category表建立主索引，索引名为primarykey，索引表为“分类编码”； 为products表建立普通索引，索引名为regularkey，索引表为“分类编码”。
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【简答题】编码性菌毛的质粒是（）|编码细菌毒力的质粒是（）|产生大肠菌素的质粒是（）|带有耐药基因的质粒是（）|编码细菌性菌毛的质粒是（）|编码细菌毒素的质粒是（）A. F质粒B. Col质粒C. r质粒D. R质粒E. Vi质粒
【简答题】编码细菌毒力的质粒为
【单选题】—How long has this bookstore been in business? —_______ 1996.
A.
After
B.
In
C.
From
D.
Since
【单选题】—How long has this bookshop been in business?— ______ 1982.
A.
After
B.
In
C.
From
D.
Since
【单选题】How long has this study been ongoing at the point of this speech?
A.
75 years
B.
58 years
C.
65 years
D.
47 years
【单选题】听力原文：M: Now, then, Mrs. Darcy. How long has this tooth been giving you trouble? W: Well, I had it filled last year and was all right until last Sunday. Then it started hurting again. Q: How long has t...
A.
For a few days.
B.
For several weeks.
C.
Since last year.
D.
For a few hours.
【单选题】— How long has this bookshop been in business?
A.
____ 1982.
B.
After
C.
In
D.
From
E.
Since
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