Images with low grayscale levels have richer layers and can show more details than images with high grayscale levels.

• A.True
• B.False

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When calling Huawei cloud computing voice service, you can call the underlying interface encapsulated by SDK, and you can access the Restful service by simulating the front-end browser. The authentication methods used by the two are?

• A.AK/SK, AK/SK
• B.Token, AK/SK
• C.AK/SK, Token
• D.Token, Token

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What are the methods for extracting speech signal features? (Multiple choice)

• A.Line Spectral Pair Parameter (LSP)
• B.Perceptual Linear Prediction (PLP)
• C.Linear Prediction Coefficient (LPC)
• D.Mel Frequency Cepstral Coefficient (MFCC)

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Which of the following options are correct about the characteristics of speech signals? (Multiple choice)

• A.Short-term analysis technology runs through the entire process of speech signal analysis
• B.The speech signal changes with time. It is a steady-state time-varying signal.
• C.The short-term range is generally considered to be 10-30ms
• D.Speech signals have short-term stability

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Which of the following options can be executed correctly? (Multiple choice)

• A.mox.file .rename (' /tmp/obs_file.txt ', ' obs
• B.mox.file .rename ('obs.//bucket_name1/obs_file.txt',
• C.mox.file .rename (' obs
• D.mox.file.rename ('/ tmp /obs_file.txt ', ' /tmp/obs_file_2.txt ')
• E.mox.file .rename (' obs

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