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

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 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

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

In order to make sure he would be able to attend the meeting, I called him up two weeks__________.( ) A: in advance B: on impulse C: in front D: on purpose

For several weeks ,_ changed.

The bridge_____________ in three weeks

How long were they on vacation? A: ten days B: two weeks C: a month D: three weeks