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【单选题】
下列哪种细胞分泌促胃液素：A.
胃腺的主细胞
B.
胃腺的壁细胞
C.
胃腺的黏液细胞
D.
胃腺的G细胞
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举一反三
【单选题】There are lots of () on the train to the North Pole.
A.
singers
B.
kids
C.
parents
D.
ghosts
【单选题】The is one of the necessary instruments in the North Pole exploration.
A.
compass
B.
passage
C.
message
D.
progress
【单选题】It can be inferred that Saunders' journey to the North Pole ______.
A.
was accompanied by his old playmates
B.
set a record in the North Pole expedition
C.
was supported by other Arctic explorers
D.
made him well-known in the 1960s
【单选题】I am still dabating in my mind_______ to accept the job.
A.
if
B.
though
C.
whether
D.
that
【简答题】工业上广泛采用的分子筛催化剂载体是低铝硅酸铝和高铝硅酸铝，也有的采用其他类型的载体。载体除了起稀释作用外，还具有什么作用？
【单选题】What is a reason WHY there is no ice in the ponds near North Pole?
A.
The ice was used to make ice sculptures.
B.
Ice carvers from around the world came to North Pole.
C.
Snowfall kept ice from forming on the ponds.
D.
North Pole cancelled its ice sculpture park.
【简答题】工业上广泛采用的分子筛催化剂载体是低铝硅酸铝和高铝硅酸铝,也有的采用其他类型的载体。载体除了起稀释作用外,还具有什么作用?
【简答题】简述正当防卫的成立条件。
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