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【单选题】
内消旋酒石酸与外消旋酒石酸性质相同的有A.
比旋光度
B.
熔点
C.
沸点
D.
酸性解离常数
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举一反三
【简答题】如果某投资项目的相关评价指标满足以下关系：NPVn/2，则可以得出的结论有（ ）。
【单选题】What is the problem/gap of the previous research?
A.
Researchers have called for programs targeting this unique transition from adolescence into early adulthood, including those specific to weight loss.
B.
No previous studies have examined the relationship between frequent self-weighing and weight loss in a behavioural weight loss program targeting a broader sample of emerging adults.
C.
Previous studies were conducted within the context of weight gain prevention and focused exclusively on college students.
D.
In adults, frequent self-weighing has been associated with weight gain prevention, weight loss and weight loss maintenance and is not associated with unhealthy weight control practices or worsening of psycho- logical symptoms.
【简答题】如果某投资项目的相关评价指标满足以下关系：NPV>0，NPVR>0，IRR>ic，PP>n/2，则可以得出的结论是（ ）。
【单选题】The results of previous research on the effects of calorie restriction are unconvincing because
A.
the subjects of the research were either of overweight or slightly underweight.
B.
calorie-restricted animals showed different physical signs in the research.
C.
the decrease in body temperature may result from changes of outside temperature.
D.
people cannot tell the benefits of losing weight from those of calorie restriction.
【单选题】Despite their lack of success so far, research scientists have ______ in their research for a cure for AIDS.
A.
maintained
B.
retained
C.
insisted
D.
persevered
【单选题】The article made no ______ to previous research on the subject.
A.
researches
B.
entrances
C.
accesses
D.
references
【简答题】A．Because she lived with her parents. B．Because her husband had had a nervous breakdown. C．Because she had less strain. D．Because she could speak French and German fluently.
【单选题】已知定义在R上的函数f（x），其导函数f′（x）的大致图象如图所示，则下列叙述正确的是（ ）
A.
f（b）＞f（c）＞f（d）
B.
f（b）＞f（a）＞f（c）
C.
f（c）＞f（b）＞f（a）
D.
f（c）＞f（b）＞f（d）
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