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【单选题】
诊断二尖瓣狭窄最准确的体征是A.
心尖区第一心音亢进
B.
右心室肥大
C.
心尖部听到舒的隆隆样杂音
D.
左心房扩大
E.
肺动脉瓣第二心音亢进
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【单选题】听力原文： An international group Human Rights Watch says a climate of fear is developing in many parts of Afghanistan which it blames on regional warlords supported at least tacitly by the United States a...
A.
Failing power of the current government.
B.
A growing fear in many parts of the country.
C.
Power struggle among regional warlords.
D.
Unusual power of the religious diehards.
【单选题】The morning news says a school bus ______ with a train at the junction, and a group of policemen were sent there immediately.
A.
bumped
B.
crashed
C.
collided
D.
struck
【简答题】什么叫电力网？
【单选题】The morning news says a school bus ______ with a train at the junction and a group of policemen were sent there immediately.
A.
bumped
B.
collided
C.
crashed
D.
struck
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