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