汽车维修质量纠纷的调解，需要法律法规支持，同时需要合理、正确的途径去维护承托修双方的合法权益。（）
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A virus is a tiny infectious（）
A. cell
B. living thing
C. particle
D. nucleic acid
Which one is the world largest known bacterium（）
A. Epulopiscium fishelsoni
B. Escherichia coli
C. Bacillus subtilis
D. Thiomargarita namibiensis
All phototacfic bacteria respond to light by（）
A. moving away from the source of light
B. moving toward the source of light
C. increasing the movement of their flagella
D. creating gas vesicles to rise to the surface
Who firstly invented micorscope and oberserved bacteria（）
A. Robert Koch
B. Louis Pasture
C. Antony van Leeuwenhock
D. Alexander Fleming
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