化学杀菌的目的在于
A．减少微生物的数目
B．改变菌的性质
C．除净微生物
D．减弱菌的抗性
E．降低菌的活性
参考答案：A
补全对话。
A: Good morning, Bob.
B: Good_____1___ , Miss Smith. How are you?
A: Very well, _____2___ . And you?
B: _____3___ fine, thank you.
A: What's that young man's_____4___ .
B:______5__ name is Dick Johnson.
A: What is he?
B: He's ___6_____English teacher.
A: ___7_____ ___8_____is he?
B: He is twenty-one years old.
A: ______9__ was he born?
B: He was born ___10_____ Hefei.
脊髓空洞症的感觉障碍常常是
A．神经干型B．末梢型C．分离型D．后根型E．脊髓横贯型
