某产品具有5个功能领域：F,F,F,F,F，其中一对一强制评分后修正得分,各功能领域的现实成本如下表所示。

F的功能评价系数是(　　)。

A:0.20 B:0.27 C:0.28 D:0.30

某产品具有5个功能领域：F,F,F,F,F，其中一对一强制评分后修正得分,各功能领域的现实成本如下表所示。

F的成本系数是(　　)。

A:0.136 B:0.220 C:0.236 D:0.256

某产品具有5个功能领域：F,F,F,F,F，其中一对一强制评分后修正得分,各功能领域的现实成本如下表所示。

F的价值系数是(　　)。

A:0.855 B:0.886 C:0.898 D:1.187

某男性患者，65岁。发热伴右上腹钝痛2天，恶心，食欲下降、乏力。继往有糖尿病史。查体：T39.4℃，右下胸及肝区叩击痛，右上腹肌紧张及触痛。X线胸腹部检查示：肝影增大伴局限性隆起，右膈肌上抬。F-FDGPET示肝右叶放射性分布局灶性异常浓聚，SUVave5.7，SUVmax8.6。

有关F-FDGPET临床作用的说法，不正确的是

A:炎症的严重程度与局部F-FDG的浓聚程度具有一定的相关性 B:特异性鉴别肝细菌性脓肿与肝细胞癌 C:炎症病灶摄取F-FDG的量受患者血糖水平的影响 D:F-FDG炎症显像有助于临床急性炎症的快速诊断 E:应用于临床的炎症谱广，各种炎症病灶大多可灵敏摄取F-FDG

某男性患者，47岁。咳嗽2周入院。干咳，无咯血，无畏寒、发热，否认结核病史。一直从事银行业工作。血常规：WBC6.7×10/L，其中N52%,L40%,E0.8%.PPD(1:2000)试验：(±),ESR35mm/h。胸部CT示右下肺内基底段见一约1.6cm×1.8cm结节，无分叶、毛刺及胸膜牵拉征。为进一步鉴别结节性质，拟行F-FDGPET/CT显像。

F-FDGPET/CT显像前准备包括

A:禁食6小时以上 B:测定患者身高、体重及血糖水平 C:注射显像剂前及注射显像剂后至显像时患者处于安静、舒适的状态 D:显像前饮水 E:显像前排空膀胱 F:若血糖水平超过7.6mmol/L，则须注射胰岛素以减低血糖浓度至正常水平

某男性患者，47岁。咳嗽2周入院。干咳，无咯血，无畏寒、发热，否认结核病史。一直从事银行业工作。血常规：WBC6.7×10/L，其中N52%,L40%,E0.8%.PPD(1:2000)试验：(±),ESR35mm/h。胸部CT示右下肺内基底段见一约1.6cm×1.8cm结节，无分叶、毛刺及胸膜牵拉征。为进一步鉴别结节性质，拟行F-FDGPET/CT显像。

对可能出现的F-FDGPET/CT征象的解读不正确的是

A:SUV低于2．0，考虑结节良性病变可能性大 B:SUV高于2.5，且延迟相SUV超过早期相SUV，考虑结节恶性病变可能性大 C:恶性肿瘤病变SUV与病灶病理分化程度呈正相关 D:恶性肿瘤病变SUV愈高，则患者预后相对愈差 E:若患者血糖水平增高，分析F-FDGPET/CT结果时应考虑血糖水平的影响 F:错构瘤常呈阳性结果

 某患者男性，53岁，发热、寒战伴右上腹钝痛2天。既往有糖尿病史。查体：T39.4℃，肝区叩击痛，右上腹肌紧张及触痛。X线胸腹部检查示：肝影增大伴局限性隆起，右膈肌上抬。[1b66f535-14b5-4d07-8b1a-f32d38ace944.jpeg" />F-FDGPET示肝右叶放射性分布局灶性异常浓聚，SUVave4.7，SUVmax7.3。

有关F-FDGPET临床作用的说法，不正确的是

A:炎症病灶摄取F-FDG的量受患者血糖水平的影响 B:F-FDG炎症显像有助于临床急性炎症的快速诊断 C:炎症的严重程度与局部F-FDG的浓聚程度具有一定的相关性 D:特异性鉴别肝细菌性脓肿与肝细胞癌 E:应用于临床的炎症谱广

 某男性患者，55岁。发热、寒战伴右上腹钝痛2天。既往有糖尿病史。查体：T39．4℃，肝区叩击痛，右上腹肌紧张及触痛。X线胸腹部检查示：肝影增大伴局限性隆起，右膈肌上抬。[aa811188-f6eb-4f9a-b39e-2570d89b08b6.jpeg" />F-FDG PET示肝右叶放射性分布局灶性异常浓聚，SUVave4．7，SU-Vmax7．3。

有关F-FDG PET临床作用的说法，不正确的是

A:炎症病灶摄取F-FDG的量受患者血糖水平的影响 B:F-FDG炎症显像有助于临床急性炎症的快速诊断 C:炎症的严重程度与局部F-FDG的浓聚程度具有一定的相关性 D:特异性鉴别肝细菌性脓肿与肝细胞癌 E:应用于临床的炎症谱广

Maglev Trains

1 A few countries are using powerful electromagnets to develop high-speed trains, called maglev trains. Maglev is short for magnetic levitation¹, which means that these trains float over a guide way using the basic principles of magnets to replace the old steel wheel and track trains.

2 If you’ve ever played with magnets, you know that opposite poles attract and like poles repel each other². This is the basic principle behind electromagnetic propulsion. Electromagnets are similar to other magnets in that they attract metal objects, but the magnetic pull is temporary. You can easily create a small electromagnet yourself by connecting the ends of a copper wire to the positive and negative ends of an AA-cell battery³. This creates a small magnetic field. If you disconnect either end of the wire from the battery, the magnetic field is taken away.

3 The magnetic field created in this wire-and-battery experiment is the simple idea behind a maglev train rail system. There are three components to this system: A large electrical power source, metal coils lining a guide way or track, and large guidance magnets attached to the underside of the train.

4 The big difference between a maglev train and a conventional train is that maglev trains do not have an engine — at least not the kind of engine used to pull typical train cars along steel tracks⁴. The engine for maglev trains is rather innoticeable. Instead of using fossil fuels, the magnetic field created by the electrified coils in the guideway walls and the track combines to propel the trains⁵.

5 The magnetized coil running along the track, called a guideway, repels the large magnets on the train’s undercarriage, allowing the train to levitate between 1 to 10 cm above the guideway. Once the train is levitated, power is supplied to the coils within the guideway walls to create a unique system of magnetic fields that pull and push the train along the guideway. The electric current supplied to the coils in the guideway walls is constantly alternating to change the polarity of the magnetized coils. This change in polarity causes the magnetic field in front of the train to pull the vehicle forward, while the magnetic field behind the train adds more forward thrust.

6 Maglev trains float on a cushion of air, eliminating friction. This lack of friction allows these trains to reach unprecedented ground transportation speeds of more than 500 kph, or twice as fast as the fastest conventional train. At 500 kph, you could travel from ParistoRomein just over two hours.

词汇： 

levitate / "levɪteɪt / v. 悬浮

line /lain/ v.排列成行 

electrified / ɪ"lektrɪfaɪd / v.使带电

propel / prə"pel / vt. 推进 

levitation / ˌlevɪ"teɪʃn / n. 悬浮

underside / ˈʌndəsaɪd / n.下侧，下面 

magnetize / "mæɡnətaɪz / v. 使带磁

propulsion / prəˈpʌlʃn / n. 推进 

guideway / ˈgaɪdweɪ / n. 导向槽

undercarriage / ˈʌndəkærɪdʒ / n. 车盘

注释:  

1. Maglev is short for magnetic levitation :maglev 是magnetic levitation 的缩略词。

2. opposite poles attract and like poles repel each other: 异极相吸，同极相斥

3. AA-cell battery：5号电池  

4. at least not the kind of engine used to pull typical train cars along steel tracks: 至少不是沿着轨道拉动典型的火车车厢的那种发动机。

B   to explain why maglev trains are faster 

C   to pull and push the train forward 

D   to create a magnetic field  

E   to experiment with the maglev train  

The frictionless maglev train enables you _______.

A:A B:B C:C D:D E:E F:F

(五)某建设项目由10个带有依赖关系的活动A、B、C、D、E、F、G、H、I、J构成，表示各项活动之间关系与时间耗费的项目网络图如下(单位：天)

关于活动F的说法，正确的有()。

A: F是虚活动 B: F的时间消耗是2天 C: F的时间消耗是0天 D: F表示活动H必须在活动A完成后才能开始