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Using a Doppler ultrasound device, fetal heartbeats can be detected by the twelfth week of pregnancy.
  • AUsing a Doppler ultrasound device, fetal heartbeats can be detected by the twelfth week of pregnancy. 分析该选项
  • BFetal heartbeats can be detected by the twelfth week of pregnancy, using a Doppler ultrasound device. 分析该选项
  • CDetecting fetal heartbeats by the twelfth week of pregnancy, a physician can use a Doppler ultrasound device. 分析该选项
  • DBy the twelfth week of pregnancy, fetal heartbeats can be detected using a Doppler ultrasound device by a physician. 分析该选项
  • EUsing a Doppler ultrasound device, a physician can detect fetal heartbeats by the twelfth week of pregnancy. 分析该选项
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正确答案: E

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