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【单选题】
急性心肌梗死最典型的心电图改变是A.
Q 波的时限 ≥0.03s ，幅度 ≥ 同导联 R 波的 1 ／ 4
B.
T波深倒置
C.
出现病理性Q波、ST段弓背高伴T波倒置
D.
ST段缺血型下移≥0.2mV，T波倒置
E.
QRS波群低电压
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皮皮学刷刷变学霸
举一反三
【多选题】Which of these sentences are true about cloud seeding, according to the passage?
A.
China carries out more cloud seeding than anywhere else.
B.
Cloud seeding is too expensive for most countries.
C.
Cloud seeding is mostly done for scientific rather than economic reasons.
D.
Cloud seeding helps turn dry areas of land into agricultural areas.
E.
Cloud seeding may affect the distribution of rainfall.
【简答题】These sentences are about the reading. Complete them with the target words and phrases in the box.
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