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【单选题】
（）是目前世界上国际旅游业最发达的地区A.
欧洲
B.
美洲
C.
东亚和太平洋地区
D.
非洲
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举一反三
【多选题】which options below belong to essential amino acid for human body?
A.
Phenylalanine
B.
Glycine
C.
Tryptophan
D.
Serine
【简答题】塑料是以 为主要成分 , 加入能够改善其加工或使用性能的 ,在一定温度 , 压力或溶剂等作用下 , 能够塑制成设计要求的形状 , 并可在常温常压下保持其形状的一类材料
【单选题】The amino acid pool allows for constant substrates to be available for numerous bodily uses. Which statement below best describes this amino acid pool?
A.
Approximately 80% of the body ’ s total protein is in the amino acid pool.
B.
Dietary proteins constitute most of the amino acid pool.
C.
The concentration of free amino acids is as rigidly controlled as blood glucose levels.
D.
The synthesis of new protein is the major use of amino acids in the amino acid pool.
E.
Changes in the rate of protein synthesis and degradation occur within seconds to minutes.
【单选题】在所列出的:1.字处理软件,2.Linux,3Unix,4.学籍管理系统,5.Windows XP,6.Office 2003等六个软件中,属于系统软件的有______。
A.
1,2,3
B.
2,3,5
C.
1,2,3,5
D.
全部都不是
【单选题】An individual has been diagnosed with Hartnup disease and is experiencing symptoms consistent with niacin deficiency. In this patient, which amino acid is no longer able to “ spare ” the dietary requi...
A.
Alanine
B.
Tryptophan
C.
Glutamine
D.
Leucine
E.
Methionine
【单选题】在所列出的:1.字处理软件,2. Linux,3. Unix,4. 学籍管理系统,5. Windows XP,6. Office 2016,六个软件中,属于系统软件的有()
A.
1,2,3
B.
2,3,5
C.
1,2,3,5
D.
全部都不是
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