构成蛋白质的20种氨基酸通过哪几种产物进入三羧酸循环？
参考答案：乙酰CoA；a-酮戊二酸；琥珀酸单酰CoA；延胡索酸；草酰乙酸。
Which of the following goals would be appropriate for the client with hepatitis B
A．The client will verbalize the importance of using sedatives to provide adequate rest.
B．The client will avoid social activities with friends after discharge from the hospital.
C．The client will adhere to measures to prevent the spread of infection to others.
D．The client will adhere to a low sodium, low protein diet.
在飞行中双发正常工作的情况下，若发生左右主油箱油量不均衡，应（）
A、先关闭交输活门，再打开油量较少油箱的增压泵
B、先打开交输活门，再关闭油量较少油箱的增压泵
C、先关闭油量较少油箱的增压泵，再打开交输活门
D、先关闭交输活门，再打开油量较多油箱的增压泵
