抗结核药中的杀菌剂有
A．异烟肼
B．利福平
C．链霉素
D．乙胺丁醇
E．比嗪酰胺
参考答案：A,B,C,E
Scientists have created the world's smallest "snowman", ____ about a fifth of the width of a human hair. [ ]
A. measuring
B. measures
C. measured
D. to measure
试述池塘溶氧变化规律是什么？
