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【单选题】
当被分析组分的沸点范围很宽时,以等温的方法进行气相色谱分析就很难得到满意的 分析结果,此时宜采用( )的办法。
A.
程序升温
B.
梯度洗脱
C.
顶空进样
D.
增加柱温
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【单选题】一般事故自发生之日起多少日内,如伤亡人数变化导致事故等级发生变化,依照规定应当由上级人民政府负责调查
A.
15
B.
20
C.
30
D.
60
【单选题】The figure given below shows a situation where the producers of good X are forming an international cartel. Here, MR = Marginal Revenue, MC = Marginal Cost, and P = Price. The cartel use monopoly pri...
A.
B.
C.
D.
D
【单选题】If a n individual consumes more of good X when his/her income doubles , we can infer that a. the individual is highly sensitive to changes in the price of good X. b. good X is a n ormal good. c. good ...
A.
B.
C.
D.
D
【单选题】对于拟行桩冠修复的患牙,下列那种根管充填方法最佳
A.
system B热牙胶垂直加压充填
B.
热牙胶垂直加压充填
C.
塑化治疗
D.
侧方加压充填
E.
碘仿糊剂充填
【单选题】Use the following statements to answer this question. I. A price-consumption curve is derived by varying the price of asparagus. If the price-consumption curve is an upward sloping straight line,...
A.
I and II are true.
B.
I is true, and II is false.
C.
I is false, and II is true.
D.
I and II are false.
【简答题】烷烃的通式为(),烯烃的通式为()。炔烃的通式为()。
【简答题】烷烃的通式为 ,烯烃的通式为 ,烷烃燃烧的产物是 、 。烯烃燃烧的产物是 、
【单选题】一般事故自发生之日起( )内,如伤亡人数变化导致事故等级发生变化,依照规定应当由上级人民政府负责调查。
A.
15日
B.
20日
C.
30日
D.
60日
【单选题】菜患者,男,36岁。交通事故后,膝关节肿胀、疼痛、皮下瘀斑,局部压痛明显和功能障碍,主、被动活动均可导致疼痛加重,沿韧带附着及循行部位可触及明确的压痛。膝关节侧方应力试验阳性。X线片示侧方试验下,伤侧关节间隙增宽。应考虑的诊断是( )
A.
膝关节侧副韧带损伤
B.
膝关节半月板损伤
C.
膝关节交叉韧带损伤
D.
膝关节滑膜炎
E.
髌骨劳损
【单选题】If the price level increases, but workers' money wage rates remain constant, which of the following is TRUE? I. The quantity of labor demanded will increase. II. The real wage rate will decrease. I...
A.
I only
B.
I and II
C.
II and III
D.
I, II and III
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