Helen Alba and Kobin Lubis have deferring views on the future performance of U-Cite. Consequently, Alba has taken a short position while Lubis has purchased the stock on margin. The relevant details are as follows: Market price per share: $42 Number of shares purchased: 1000 Holding period: 1 year Ending share price: $50 Initial margin requirement: 45% Maintenance margin: 30% Transaction and borrowing cost: $0 Alba and Lubis will receive margin calls at a stock price of: Alba Lubis()①A. $37.66 $53.45 ②B. $46.85 $53.45 ③C. $46.85 $33.00

A. ①

B. ②

C. ③

流行性出血热传播途径不包括()

A．夏天蚊虫叮咬病人，然后再叮咬其他人

B．吸入鼠类带病毒排泄物污染的尘土

C．进食鼠类带病毒排泄物污染的食物

D．孕妇感染的病毒经胎盘感染胎儿

E．经过皮肤伤口感染