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【单选题】
卡介苗是根据下述哪项变异原理制备的A.
形态变异
B.
菌落变异
C.
毒力变异
D.
膜变异
E.
耐药性变异
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皮皮学刷刷变学霸
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【单选题】My brother has _____ in Japan. [ ]
A.
pen pal
B.
a pen pal
C.
two pen pal
D.
a pen pals
【单选题】He shouted to them ___________ the top of his voice but wasn’t heard.
A.
on
B.
of
C.
at
D.
from
【单选题】He bought a new building ______ top is different from others around.
A.
what
B.
which
C.
that
D.
whose
【单选题】I was ____ he received an invitation from his friend to visit Chongqing ____ he felt on top of the world. [ ]
A.
when; who
B.
that ; that
C.
when; that
D.
that; where
【单选题】—Is this your pen? —________. [ ]
A.
Yes, it's a pen.
B.
No. it's my pen.
C.
No, it's her pen.
D.
Yes, it's her pen.
【简答题】When he saw from the top of the mountain, he viewed a beautiful city. ____from the top of the mountain, he viewed a beautiful city.(用分词)
【单选题】The captain stood by the window, _____ he could see the top of the tower.
A.
where
B.
from which
C.
from where
D.
which
【简答题】Gregg Bleakney’s dream was to travel the Americas from top to bottom. He got the idea after he finished a long bike ride. Gregg’s friend, Brooks Allen, also liked riding a bike. The two friends talked...
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【单选题】He shouted to them ___________ the top of his voice but wasn’t heard.
A.
on
B.
of
C.
at
D.
from