按照金融期权基础资产性质的不同,金融期权可以分为股权类期权、利率期权、货币期权、金融期货合约期权、互换期权等。()
外国旅游者提出要求,请导游员帮助购买中国名画,并代办托运回国。导游员应该_____。
In a four-stroke/cycle diesel engine, after the completion of the power stroke, the piston
A. up and draw in a fresh air charge
B. down to burn off fuel
C. down to compress the fuel air charge
D. up and force out the exhaust gases
犬,5岁,消痩,腹泻与便秘交替出现,以腹泻为主,无其他明显症状。该犬可能患有()
A. 急性肠炎
B. 慢性肠炎
C. 肠阻塞
D. 肠套叠
E. 胰腺炎