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Using a Doppler ultrasound device, fetal heartbeats can be detected by the twelf
Using a Doppler ultrasound device, fetal heartbeats can be detected by the twelf
游客
2025-02-25
26
管理
问题
Using a Doppler ultrasound device, fetal heartbeats can be detected by the twelfth week of pregnancy
.
选项
A、Using a Doppler ultrasound device, fetal heartbeats can be detected by the twelfth week of pregnancy.
B、Fetal heartbeats can be detected by the twelfth week of pregnancy, using a Doppler ultrasound device.
C、Detecting fetal heartbeats by the twelfth week of pregnancy, a physician can use a Doppler ultrasound device.
D、By the twelfth week of pregnancy, fetal heartbeats can be detected using Doppler ultrasound device by a physician.
E、Using a Doppler ultrasound device, a physician can detect fetal heartbeats by the twelfth week of pregnancy.
答案
E
解析
A错,因为fetal heart-beats不能作using的逻辑主语。B中指using短语放在句末,不知作何成分,作定语或状语都不合适。C中句子的主次颠倒;把原本表方式的动词改为作主句的谓语动词,主要动作却放在从属位置。D中using短语插在detected和by a physician之间,同B一样不知作何成分。
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