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【单选题】
韧皮部细胞是高度分化的植物细胞，用韧皮部细胞进行组织培养可以形成愈伤组织，下列叙述错误是 [ ]A.
该愈伤组织是细胞经过脱分化和细胞分裂形成的
B.
该愈伤组织的细胞没有全能性
C.
该愈伤组织是由排列疏松的细胞组成
D.
该愈伤组织可以形成具有生根发芽能力的胚状结构
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【单选题】I think the boss， rather than the workers， __________ to blame for the fire that caused so many deaths.
A.
are
B.
were
C.
was
D.
to be
【单选题】I shall never forget those years ______ I worked in the factory with the workers, ______ has a great effect on my life.
A.
when, that
B.
which, which
C.
in which, when
D.
in which, which
【单选题】When I got to the factory, the workers ________ about the film.
A.
are taking
B.
talked
C.
were talking
【单选题】I think all the workers, ________ the leader _____ playing the most important role.
A.
rather than ; are
B.
rather ; are
C.
more than ; is
D.
less than ; is
【单选题】I shall never forget those years _____ I worked in the factory with the workers, _____ has a great effect on my life. [ ]
A.
when, that
B.
that, which
C.
as, who
D.
when, which
【单选题】How do the workers in the poem “I Hear America Singing” feel about their songs?
A.
They don't really care about them
B.
They hate them
C.
They're looking for recording industry contracts for them
D.
They feel a sense of ownership about them
【单选题】I have seen the plants _______ by the workers here.
A.
watered
B.
watering
C.
to be watered
D.
w ater
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