)

患者，男，28岁，暴饮暴食后出现上腹部绞痛，向肩背部放射，送到医院急诊，此时最具诊断意义的实验室检查为（）

A.血清淀粉酶测定

B.尿淀粉酶测定

C.血钙测定

D.血清脂肪酶测定

E.血糖测定

商业银行财务比率中各项周转率越高，盈利能力和偿债能力也就越好。（）

患者男性，59岁，吸烟30年，每日20支，每遇秋冬咳嗽15年，到呼吸科门诊咨询是否有慢性阻塞性肺病。

慢性阻塞性肺病进展中最先异常的实验室检查为（）

A.肺泡-动脉氧压差

B.胸部X线片

C.最大呼气流速（FEFR）

D.一秒钟用力呼气容量

E.用力肺活量时的最大呼气中期流量

F.EF（25％～75％）

下列关于期权的说法，正确的是（）。

A．与远期、期货一样，期权的买方行使其权利，承担其义务

B．投资者一般在预期价格上升时，购人看跌期权

C．期权买方为了行使其权利，需要向期权卖方支付一定的期权费

D．美式期权是目前较为流行的方式

What might driving on an automated highway be like The answer depends on what kind of system is ultimately adopted. Two distinct types are on the drawing board. The first is a special-purpose lane system, in which certain lanes are reserved for automated vehicles. The second is a mixed traffic system: fully automated vehicles would share the road with partially automated or manual driven cars. A special-purpose 1ane system would require more extensive physical modifications to existing highways, but it promises the greatest gains in freeway (高速公路) capacity.

Under either scheme, the driver would specify the desired destination, furnishing this information to a computer in the car at the beginning of the trip or perhaps just before reaching the automated highway. If a mixed traffic system way was in place, automated driving could begin whenever the driver was on suitably equipped roads. If special-purpose lanes were available, the car could enter them and join existing traffic in two different ways. One method would use a special onramp (入口引道). As the driver approached the point of entry for the highway, devices installed on the roadside would electronically check the vehicle to determine its destination and to ascertain that it had the proper automation equipment in good working order. Assuming it passed such tests, the driver would then be guided through a gate and toward an automated lane. In this case, the transition from manual to automated control would take place on the entrance ramp. An alternative technique could employ conventional lanes, which would be shared by automated and regular vehicles. The driver would steer onto the highway and move in normal fashion to a "transition" lane. The vehicle would then shift under computer control onto a lane reserved for automated traffic. [The limitation of these lanes to automated traffic would, presumably, be well respected, because all trespassers (非法进入者) could be swiftly identified by authorities. ]

Either approach to joining a lane of automated traffic would harmonize the movement of newly entering vehicles with those already traveling. Automatic control here should allow for smooth merging without the usual uncertainties and potential for accidents. And once a vehicle had settled into automated travel, the driver would be free to release the wheel, open the morning paper or just relax.

A special-purpose lane system is probably advantageous in that ().

A. it would require only minor changes to existing highways

B. it would achieve the greatest highway traffic efficiency

C. it has a lane for both automated and partially automated vehicles

D. it offers more lanes for automated vehicles