长效口服避孕药服药一次可避孕 A．1个月 B．2个月 C．3个月 D．6个月 E．1

An analyst notes the following about a company: Beginning inventory was reported as $ 5000. Costs of goods sold was reported as $ 8000. Ending inventory was $ 7000 (the analyst has physically verified this amount). Which of the following statements about this situation is most likely correct（）

A. Purchases must have been $ 8000.

B. If the analyst discovered that beginning inventory was understated by $ 2000 then earnings before taxes must have been overstated by $ 2000.

C. If the analyst discovered that beginning inventory was overstated by $1000 then COGS must have been understated by $1000.

刘惠同学根据维生素C可使高锰酸钾溶液褪色的原理，设计了如下实验：在四只同样的试管中分别加入质量分数相同的高锰酸钾溶液2 ml，然后用滴管分别向其中滴加几种蔬菜汁液，观察结果如下，判断哪种蔬菜（汁）含维生素C最多。 （　　）

男性，50岁，糖尿病6年，发热3天，咳痰少量带血丝，肺部未闻哕音，胸片右肺上野及中野密度较淡浸润影，似有透光区，血WBC9.2×10⁹/L。

下列检查哪项对诊断最有意义（）

A．血沉 

B．痰细菌培养 

C．痰抗酸杆菌检查 

D．血培养 

E．纤维支气管镜检查

患者，男，60岁。有胃癌病史3年。现症见胸膈满闷，吞咽困难，腹胀厌食，泛吐粘痰，呕吐宿食。苔白腻，脉弦滑。检查：胃镜示早期胃癌Ⅰ型（隆起型），胃液分析示胃酸缺乏。治疗应首选（）

A.海藻玉壶汤

B.附子理中汤

C.膈下逐瘀汤

D.柴胡疏肝散

E.半夏厚朴汤

简述法治的原则