The best age to crop the ears of a Boxer is () A: 7 to 8 weeks old B: 9<br/>to 10 weeks old C: 11 to 12 weeks old D: 13 to 14 weeks old

Which is suitable for vacuum aspiration？ A: pregnancy of less than 10 weeks B: pregnancy of less than 12 weeks C: pregnancy of less than 14 weeks D: pregnancy of less than 16 weeks E: pregnancy of less than 18 weeks

The time of the first delivery should be ( ) A: Early response B: Diagnosis of early pregnancy C: at 12 weeks D: at 16 weeks

In the past 12 months, Tom worked as a GP for _______________. A: 4 days B: 4 weeks C: 3 days D: 3 weeks

I haven't seen her _____. A: two weeks ago B: since two weeks C: for two weeks D: efore two weeks

The fetal lungs are capable of breathing after ( ). A: 20 weeks' gestational age B: 24 weeks' gestational age C: 28 weeks' gestational age D: 32 weeks' gestational age E: 16 weeks' gestational age

Howlong does the whole course of vocational education last? A: A week. B: 8–12weeks. C: 3years. D: 2–3.5years.

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

One day on the moon is ______. A: two Earth week long B: two Earth weeks long C: two Earth weeks longer D: two Earth weeks length

For several weeks ,_ changed.