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【单选题】
关于纤维性心包正确的描述是
A.
分壁层和脏层
B.
后部与左心房后壁间有心包斜
C.
与出入心的大血管外膜相续
D.
下方与膈胸膜相贴
E.
与心外膜之间构成心包腔
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【单选题】Every lifeboat which is fitted with a fixed two-way()radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effec...
A.
HF
B.
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C.
MF
D.
MF/HF
【简答题】She loves parties so much that she is always the last one(leave)_________.
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A.
dummy
B.
a supporting facilities
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a back-up equipment
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an antenna
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A.
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B.
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D.
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【单选题】Every lifeboat which is fitted with a fixed()VHF radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effective...
A.
one-way
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A.
a dummy antenna
B.
a supporting facilities
C.
a back-up equipment
D.
an antenna
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A.
a dummy antenna
B.
a supporting facilities
C.
a back-up equipment
D.
an antenna
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A.
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no matter what
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no matter how
【单选题】.若两个非零向量 与 是共线向量,则( )。
A.
与 的方向一定相同
B.
与 的长度一定相等
C.
与 的方向一定相反
D.
与 一定平行
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