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【单选题】
在吞咽时遮盖喉口，以防食物进入喉腔的软骨是 ( )A.
甲状软骨
B.
环状软骨
C.
会厌软骨
D.
杓状软骨
E.
小角软骨
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反馈参考答案：
举一反三
【单选题】She was absent for class today? Do you know the reason ____she was absent?
A.
what
B.
why
C.
how
D.
when
【简答题】估算． 485×5≈ 502×6≈ 396×7≈ 290×8≈ 492×7≈ 104×8≈
【单选题】She was absent __the meeting yesterday because she was ill.
A.
on
B.
in
C.
for
D.
from
【单选题】How many rubbers _______ in your pencil box? [ ]
A.
there is
B.
there are
C.
is there
D.
are there
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