男性，22岁，既往有H=BsAg阳性史。10天前无诱因发烧，体温逐渐上升，波动于5～39℃，近3天体温持续在5～5℃不降，伴有食欲不振、乏力、腹胀及尿黄，查体：35℃P88／分，BPll0／70mmHg，神清，表情淡漠，未见皮疹，巩膜轻度黄染，心肺未见异常，腹软，右下腹压痛()，肝右肋下2cm，脾未触及，肝浊音区不小，移动性浊音阴性，双下肢无浮肿。化验：WBC 3.5×109／L，N 60%..IA0%.，血HBsAg()，抗HAV-IgG()。该患者最可能的诊断是

A.Speed

B.Excessive knowledge or skill

C.Human error

D.Excitement

Which of the listed conditions can lead to cavitation in a centrifugal pump？

A.Vapor pockets formed in the suction flow stream

B.Rough easing volute surfaces

C.Worn wearing rings

D.Heavy fluid in the flow stream

Which of the listed conditions can cause lacquer to be deposited on a piston skirt？

A.High sulphur content fuel

B.High lube oil temperatures

C.High vanadium content fuel

D.Excessive piston slap

Which of the listed conditions can cause a diesel engine to use too much lube oil？

A.Dirty lube oil filter

B.Too much piston ring wear

C.High lube oil viscosity

D.Low lube oil temperature

Which of the listed classes of fire is considered as one involving electrical equipment？

A.Class "A

B.Class "B"

C.Class "C"

D.Class "D"

Which of the listed cylinder liner surface conditions indicates proper lubrication？

A.Dull black appearance

B.Bright appearance

C.Thin layer of lacquer

D.Thick oily film

Which of the following can not be listed as consumer-product？

A．Brackets.

B．Gold ring.

C．Television.

D．Furniture.

A.Viscosity is decreased

B.Octane number is altered

C.Pump speed is decreased

D.Blower’s speed is decreased

Which of the listed set of conditions indicates early fuel injection timing？

A.Loss of engine power and high exhaust temperatures

B.Higher than normal firing pressure and low exhaust temperatures

C.High fuel consumption and high exhaust temperatures

D.Lower than normal compression pressure and high exhaust temperature

A.Any time it is deemed necessary

B.Only with the masters permission

C.After a 10 minute delay to the input command

D.Only after the throttle has been placed in stop