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【简答题】
简述构建cDNA文库的步骤。
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举一反三
【单选题】—____ he in the dancing or singing class? —Dancing class. He likes dancing very much. [ ]
A.
Does
B.
Is
C.
Which
D.
Will
【单选题】select count(*) from authors where city=’beijin’.对于这条语句，下面表述正确的是
A.
从 authors 表中查询出 city 是 beijin ，且名为 count 的记录数目
B.
从 authors 表中查询出 city 是 beijin 的第一条记录
C.
从 authors 表中查询出 city 是 beijin 的所有记录
D.
从 authors 表中查询出 city 是 beijin 的记录总数目
【单选题】Mary prefers _______ to ________ .
A.
sing, dance
B.
sing, dancing
C.
singing, dancing
【单选题】My mother and I_____ on the square from 8 to 9 yesterday evening. A. was dancing B. were dancing C. danced D. are dancing
A.
was dancing
B.
were dancing
C.
danced
D.
are dancing
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