目前应用于腹部临床检查最多的MRI扫描仪主磁体的磁场强度是（）A.0.1T B.0.

“人间四月芳菲尽，山寺桃花始盛开．”请你判断形成这种现象的主要原因是（　　）

A．地形因素对气候的影响

B．纬度位置对气候的影响

C．海陆位置对气候的影响

D．洋流因素对气候的影响

某储存区储存有煤油、汽油两种物质，其储存量分别是20吨、17吨，临界量分别是100吨、20吨，则储存区属于（）。

A．非重大危险源

B．安全场所

C．事故隐患

D．重大危险源

变水头渗透试验适用于粘质土。( )

如果患者有左小腿外侧、后侧及足部麻木，此患者合并

A．腰椎间盘突出症

B．腓骨小头骨折致腓总神经损伤

C．骨折致坐骨神经损伤

D．股骨头脱出致坐骨神经损伤

E．梨状肌损伤血肿压迫坐骨神经

Option investor D sells (writes, takes a SHORT position in) one of the following call options: Type of option: call option Underlying asset: 100 shares of Disney stock Exercise price: $40 per share Premium : $2.25 per share Expiration date : January The current market price of Disney stock is $39.02 per share. Investor D already owns 500 shares of Disney stock. Which of the following describes the amount of initial margin required for this transaction()

A. Since the call option is "in the money" investor D is not required to deposit initial margin. 

B. Since investor D owns at least 100 shares of Disney stock, he must deposit initial margin in the amount of 100% of the option premium. 

C. Since investor D owns at least 100 shares of Disney stock, no additional margin is required.