It is said that "Viagra” possessesmagical powers that can cure impotence. ()
A. has
B. exaggerates
C. develops
D. yields
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_____efforts are needed in order to finish important unpleasant tasks.()
A. Consecutive
B. Condensed
C. Perpetual
D. Persistent
It is said that "Viagra”()() magical powers that can cure impotence.
A. has
B. exaggerates
C. develops
D. yields
It is said that "Viagra”()() magical powers that can cure impotence. A
A. has
B. exaggerates
C. develops
D. yields
要删除mytable表中的myindex索引，可以使用（ ）语句。
A. Delete INDEX mytable.myindex
B. Delete mytable.myindex
C. DROP myindex
DROP INDEX mytable.myindex
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