To ensure delivering a healthy fetus, the more prenatal ultrasound
examinations pregnant woman has, the better.(
)
examinations pregnant woman has, the better.(
)
举一反三
- Prenatal ultrasound is usually performed for five times. They are<br/>( ). A: ultrasonography during early pregnancy (6-8 weeks pregnant) B: ultrasonography at 11-14 weeks pregnant C: ultrasonography at 20-24 weeks pregnant D: ultrasonography at 28-32 weeks pregnant, preclinical ultrasonography
- Ultrasound diagnostic technology has been applied in obstetrics for<br/>more than 50 years.(<br/>)
- Hypertension during pregnancy affects both pregnant woman and her<br/>fetus.(<br/>)
- A<br/>piezoelectric crystal is used to produce the ultrasound waves. What<br/>kind of ultrasound is produced? () A: Pressure<br/>wave ultrasound B: Electrical<br/>wave ultrasound C: Sound<br/>wave ultrasound D: Simple<br/>ultrasound
- A<br/>warehouse can be several stories high. The more stories, the better.<br/>( )