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Listening Quiz: Chuẩn Bị Mẫu Cho Khối Phổ – Medium Level
Th8 19, 2024
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What is the main topic of the conversation?
How to schedule an analysis appointment
How to prepare samples for mass spectrometry
How to organize a laboratory meeting
How to repair broken sample tubes
Explanation:
The conversation focuses on instructions for preparing samples, including cleaning, sizing, labeling, storing, and diluting them before mass spectrometry analysis.
2.
What should Anna use when cleaning the samples?
A lint-free cloth and gloves
Paper towels and water
A brush and alcohol
A refrigerator and labels
Explanation:
Mark specifically says to use a lint-free cloth and gloves for cleaning the samples.
3.
How much should each sample be?
About one milliliter
Less than half a milliliter
About five milliliters
Exactly two milliliters
Explanation:
Mark states that each sample should be about one milliliter.
4.
Where should Anna keep the samples until analysis?
In the refrigerator
On the lab bench
In a sealed box at room temperature
In a warm cabinet
Explanation:
Mark tells Anna to keep the samples in the refrigerator until analysis.
5.
What can be inferred about Anna’s task?
She is supposed to discard all the samples
She must analyze the samples immediately
She is expected to prepare the samples according to specific instructions
She only needs to label the tubes and do nothing else
Explanation:
Mark gives Anna several specific preparation steps, so it can be inferred that she is expected to prepare the samples according to those instructions.
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