1. What is the man's role? ——
A new employee.
B. A customer.
查看答案
How long will the training course last?
A. For one week.
B. For one day.
What will the man be responsible for?
A. Dealing with people.
B. Promoting the products.
心脏胚胎发育的关键时期是( )
A. 第2~4周
B. 第2~6周
C. 第2~8周
D. 第4~6周
E. 第4~8周
出生后,卵圆孔形成解剖上的关闭的时间是 ( )
A. 1~3个月
B. 3~4个月
C. 5~7个月
D. 9~10个月
E. 1周岁