具有异染颗粒的细菌是()
A．布鲁氏菌
B．炭疽芽胞杆菌
C．伤寒沙门菌
D．白喉棒状杆菌
E．百日咳鲍特菌
参考答案：D
简述我国生态农业的特点。
After the big earthquake, many rescue teams ________through the ruins to save survivors. [ ]
A. put
B. broke
C. looked
D. combed
