如果实现了哈罗德的自然增长率，社会资源将得到充分利用。
参考答案：对
Because of global warming, the ice that polar bears depend on for survival _______.
A．are slowing disappearing
B．is slowly disappearing
C．are slowly disappeared
D．have slowly disappeared
发热2周，伴腹泻，肝脾肿大，骨髓培养有伤寒杆菌生长( )
A．伤寒病人B．伤寒带菌者C．急性菌痢D．慢性菌痢E．病毒性肝炎
