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1、查阅资料，简述用于生命科学研究的缓冲体系应满足哪些条件？Good's缓冲液的主要优点有哪些？

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American English and British English may vary in______.

A. phoneme
B. grammar
C. wording and spelling
D. all of the above

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For “city, little, not”, which of the following is the correct pronunciation in American English?

A. /ˈsɪdi/, /ˈlɪdl/, /nɔt/
B. /ˈsɪti/, /ˈlɪtl/, /nɑt/,
C. /ˈsɪdi/, /ˈlɪtl/, /nɔt/,
D. /ˈsɪdi/, /ˈlɪdl/, /nɑt/.

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Which of the following statements is false about health news?

A. Health news is highly conceptualized.
B. Health news tries to give subjective delivery of news information.
C. Health news usually employ assertive sentence.
D. The information and data of health news mainly from authorities.

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the affix “cardio” means____.

A. vein
B. brain
C. heart
D. hearing

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