女，20岁，大便秘结，排便时肛门口有剧痛，手纸染鲜血，量少，可能诊断是()男，40岁

All of the following are poor examples of supervisory responsibility EXCEPT:（）

A. Proper supervision is not exercised because the supervisor’s income is partially based on unsupervised or improper trading activity.

B. Poor procedures allow a portfolio manager to designate a trade to an account or portfolio after the outcome of the trade is known.

C. Incorporating a professional conduct evaluation as part of an employee’s performance review.

已知一次函数y=（-3a+1）x+a的图象上两点A（x₁，y₁），B（x₂，y₂），当x₁＞x₂时，y₁＞y₂，且图象不经过第四象限，则a的取值范围是______．

地球上昼夜长短变化最小的地方是

A．南极和北极

B．南、北极圈

C．南、北回归线

D．赤道

隋唐时，一般平民多穿布衣，这种布的原料是 ( )

A．丝

B．麻

C．棉

D．毛

运用多股线连接电能表时，进出电能表导线部分必须镀锡。（）