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【判断题】
金属材料自由电子浓度很高,输出电压较小,不易做霍尔元件。半导体材料较适合,一般情况下,由于电子迁移率大于空穴迁移率,因此霍尔元件多用 N型半导体材料。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】送手术病人返回病房时,下列哪一项是 错误 的
A.
与病房护士做好病人交接工作
B.
保持输液通畅 ； 告知病房护士病人的术中情况
C.
护送途中应注意观察病情变化，并注意保暖
D.
手术结束后，由洗手护士和第一助手送病人回病室
【单选题】The two basic approaches that a country can take as a means to achieve free trade are the
A.
unilateral approach and the multilateral approach.
B.
short-run approach and the long-run approach.
C.
continental approach and the global approach.
D.
industry approach and the security approach.
【单选题】Arguments for free trade are sometimes disregarded by politicians because:
A.
Maximizing domestic efficiency is not considered important
B.
Maximizing consumer welfare may not be a chief priority
C.
There exist sound economic reasons for keeping one’s economy isolated from other economies
D.
Economists tend to favor highly protected domestic markets
【简答题】接送手术病人时 下列哪一项错误A. 按手术通知单规定时间迎接病人B. 交接病人时，要严格执行查对制度C. 送至指定手术间D. 护送途中注意保暖E. 手术结束后，由手术护士送病人回病室，做好交接工作
【判断题】The gains from free trade are somewhat smaller for poorer developing countries than advanced economies.
A.
正确
B.
错误
【单选题】接送手术病人时下列哪一项错误
A.
按手术通知单规定时间迎接病人
B.
交接病人时，要严格执行查对制度
C.
送至指定手术间
D.
护送途中注意保暖
E.
手术结束后，由洗手护士送病人回病室，做好交接工作
【单选题】Those who will unambiguously gain from free trade are ________ factors in sectors that produce goods that are ________.
A.
immobile; exported
B.
immobile; also imported
C.
mobile; also imported
D.
mobile; exported
E.
mobile; untraded
【单选题】Those who will lose from free trade are ________ factors in sectors that produce goods that are ________.
A.
immobile; also imported
B.
mobile; also imported
C.
immobile; exported
D.
mobile; exported
E.
mobile; untraded
【单选题】接送手术病人时下列哪一项错误
A.
按手术通知单规定时间迎接病人
B.
交接病人时，要严格执行查对制度
C.
送至指定手术间
D.
护送途中注意保暖
E.
手术结束后，由手术护士送病人回病室，做好交接工作
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