人体内的细胞外液构成了细胞生活的液体环境,在这个环境中可发生许多生化反应,其中有()。
A. 乳酸与碳酸氢钠作用生成乳酸钠和碳酸
B. 丙酮酸氧化分解成二氧化碳和水
C. 神经递质和激素的合成
D. 蛋白质消化分解成氨基酸
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根据各级对话内容,从下面提供的5个选项中选出能填入空白处的最佳选项。 A:Thank you for looking after the cat for me.B:(). I love cats.
A. Thank you
B. It’s my pleasure
C. By the way
D. No, of course not
E. Never mind
His short______in the living room had been long enough to keep him awake now.
A. dove
B. dose
C. dole
D. doze
The prime minister’s proposal for new taxes created such a(n)______that his government fell.
A. sensation
B. upheaval
C. withdrawal
D. outbreak