下列选项中，关于期货交易、现货交易和远期交易，说法正确的是( )。 A．期货交易的

Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an (6) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (7) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (8) .

As administrators seek to block dangerous email attachments through the recognition of well-known (9) , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the (10) access to your network.

7（）

A.virtual

B.virus

C.worms

D.bacteria

患者，男，42岁，搬重物后出现腰痛伴右下肢疼痛3天，咳嗽、喷嚏时加重，卧床后缓解，体检：L棘突及其右侧压痛，右侧直腿抬高试验40°（+），右小腿外侧痛觉减退，双侧膝腱及跟腱反射正常对称，弯腰活动明显受限，X线片示L_4~5椎间隙略窄。

为明确诊断，最适宜的辅助检查是（）

A.CT

B.神经传导速度检查

C.肌电图检查

D.血流图检查

E.超声检查

女性，40岁、右膝肿痛1年，反复发作，近2个月膝关宵活动受限，膝关节内穿刺抽出血性液体、不凝、X线片示膝关节肿胀、关节面完整、间隙正常、未见关节内游离体。

如果采用手术治疗，术后应特别预防（）。

A.病变复发

B.下肢肌肉萎缩

C.跛行

D.膝关节伸膝功能受限

E.膝关节屈曲功能受限

流砂的防治途径主要是（）动水压力或（）动水压力的方向。

患者，女，29岁。患者月经不调，两侧少腹疼痛2年余，有时痛如针刺，行经时加重，经期延长，经来腹痛，经量中等，色紫黑夹有血块，经后痛减，心烦欲呕，性急多怒，胸胁胀满微痛，喜太息。平时白带颇多，腰酸。妇科检查：子宫后倾，大小正常，两侧附件增粗，有压痛，分泌物多，诊为慢性附件炎，经多方医治，疗效不佳。观其舌质暗红，边有2粒绿豆大的瘀点，脉沉涩。
要求写出：诊断、病因病机、治法、选方、用药。