冷冻干燥设备的最大生产能力由（）。
A.最低冷冻温度决定
B.最大真空度决定
C.冷凝器最大负霜量决定
D.干燥室最大传热面积决定
参考答案：C
What is remarkable about the cowbird
A．The cowbird builds its nest.
B．The cowbird sits on the cow.
C．The cowbird has its own chicks.
D．The cowbird builds no nest.
甲氧苄啶的抗菌机制是
A．影响叶酸代谢B．影响胞浆膜的通透性C．抑制细菌细胞壁的合成D．抑制蛋白质合成的全过程E．抑制核酸合成
