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【单选题】
患者，女，23岁。因风湿性心脏病二尖瓣狭窄及关闭不全首次就诊，查体：心脏大，心率快，肝大，下肢水肿，心电图示快速心房纤颤，最佳治疗是A.
地
B.
西地兰静脉注射
C.
心得安
D.
泼尼松
E.
心痛定
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【单选题】Choose the correct description about earth.
A.
Earth burns and flares up
B.
Earth provides for sowing and reapng
C.
Earth moistens and descends
D.
Earth works towards transformation
【简答题】The Chicxulub crater in Mexico provides evidence that an asteroid hit Earth.
【单选题】The sun' s energy indirectly provides the earth with ______.
A.
fuels
B.
waterpower
C.
light
D.
both A and B
【简答题】The earth's biosphere (the suce layer of the planet and the surrounding atmosphere) provides the land, air, water, and energy necessary to sustain life. This life-support system is a complex, inter...
【单选题】What are the four things Earth provides to living things?
A.
air, food, water, and sunlight
B.
air, pets, toys, and shelter
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