Gram staining is the most commonly used staining method, and its practical significance does not include () A: Identification of bacteria B: selection of antibiotics C: understanding of bacterial pathogenicity D: understanding of cell staining E: observing the special structure of bacteria

The<br/>methods for color mixing watercolors can be as follows:( )(()()()())) A: juxtaposition method B: mixed method C: solution method D: replacement method

Currently, the frequently used methods for ampoule cleaning mainly include:( ) A: the alternating pressurized water and gas jet B: ultrasonic washing C: water-dumping washing methods D: Washing-free ampoule

For established private companies, the most widely used valuation method is _____. A: Discounted Cash Flow model B: the First Chicago method C: Venture Capital Method D: Relative valuation method

Companies use two methods to account for uncollectible accounts: the direct write-off method and the allowance method. ( )