专升本考试易错题(2018/11/20) |
第1题: The telephone______four times in the last hour, and each time it______for my roommate. A.has rung; was B.has been ringing; is C.had rung; was D.rang; has been |
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第2题: 下列关于正常心电图的叙述错误的是( ) A.P波代表两心房去极化 B.QRS波代表两心室去极化 C.ST段很稳定,表明心室肌处于静息状态 D.PR间期延长说明房室传导阻滞 E.ST段表明心室各部分之间没有电位差存在 |
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第3题: They are busy ______ in their lessons before the exam. A.going after B.going over C.going by D.going ahead |
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第4题: Anything dropped falls towards the center of the earth because of ______. A.weight B.gravity C.density D.attraction |
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第5题: ![]() |
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