Duplicate samples can also be called（） A: Counter samples B: sealed samples C: confirmed samples D: reference samples

Counter samples can also be called （ ）. A: duplicate samples B: sealed samples C: confirmed samples D: reference sample

Which of the following is not one of the duties for Quality Controller? A: test samples B: deliver the cargos C: return defect items D: inspect finished products

These samples are for you to choose _____.

中国大学MOOC: The following two paragraphs were written on the topic “The Best or Worst Job You Ever Had”. Both are unified and both are supported. However, one communicates more clearly and effectively. Which one, and why?【图片】【图片】Samples from"Exploring Writing Paragraphs and Essays"

Counter samples can also be called （）

When analyzing biological samples by LC-MS, one of the following methods that cannot eliminate the matrix effect is () A: Change the ionization method B: Increase the injection volume C: Optimize sample preparation methods D: Adjust the mobile phase composition

There is a wide variety of samples in our exhibition hall.

_____ the received goods with the samples, the quality was found unsatisfactory.

you send us samples of your products?