产蛋鸡能量需要，通常2/3用于维持，1/3用于产蛋，并且首先满足维持的营养需要，然后才用于产蛋。()
查看答案
The man wants to have _____ in the apartment.
A. a swimming pool
B. a washing machine
C. a balcony
D. a central air conditioning
_____sagree on whether the cheerleaders are entertaining or just an irritating thstraction.
A. Spectators
B. Athletes
C. Fans
D. Cheerleader choreographers
国外品种猪因为其屠宰率高、肉脂品质好和生长速度快被我国养猪业广泛引入。()
The social consequences caused by advances in medicine includes the following EXCEPT that
A. children are much healthier.
B. infant mortality rates are lower.
C. the size of the family becomes smaller.
D. means of birth control are more effective.
微信支付 
支付宝支付