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【单选题】
关于生物碱的描述错误的是()A.
生物碱一般呈碱性
B.
氨基酸、氨基糖不是生物碱
C.
生物碱在高等植物中分布很广
D.
一般与萜或挥发油共存
E.
在植物体内形成盐酸盐、硫酸盐等
F.
旋光性受pH值、溶剂影响
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举一反三
【单选题】A 35-year-old woman presents to her family physician’s office with fatigue of at least 3 months’ duration. Her only explanation is that keeping up with her twin 4-year-olds really tires her out, and s...
A.
Iron
B.
Niacin
C.
Glucose-6-phosphatase
D.
Folate
【单选题】已知函数定义int f(int m){static int i=0;int s=0;for(;i<=m;i++)s+=i;return s;},执行语句“sum=f(4)+f(2);”后,sum的值应为( )。
A.
8
B.
10
C.
13
D.
16
【简答题】A．The woman is too big a fuss about her condition. B．Fatigue is a typical symptom of lack of exercise. C．The woman should spend more time outdoors. D．People tend to work longer hours with artif...
【简答题】导游讲解常用的类比法可以分为( )
【单选题】A 25-year-old woman presents with chronic fatigue. A series of blood tests is ordered, and the results suggest that her red blood cell count is low because of iron-deficiency anemia. Such a deficiency...
A.
Her decrease in Fe – S centers is impairing the transfer of electrons in the ETC.
B.
She is not producing enough H2O in the electron-transport chain,leading to dehydration, which has resulted in fatigue.
【单选题】Her fatigue was obvious after the long journey and sleepless nights. (近义词)
A.
excitement
B.
surprise
C.
weariness
D.
vigor
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