设某国定期存款年利率为5%，计息周期为一年。若按照复利计息，5年后的本利和是按照单利

反转录病毒科的病毒因带有以RNA为模板合成DNA的反转录酶而得名。已经发现人免疫缺陷病毒有HIV-1和HIV-2，两型病毒的核苷酸序列相差超过40%。HIV-1是引起全球艾滋病流行的病原体，HIV-2主要局限于西部非洲，且毒力较弱，引起的艾滋病特点是症状轻、病程长。

AIDS的病原体主要是（）

A.HTLV-1型

B.HTLV-2型

C.HTLV-5型

D.HIV-1型

E.HIV-2型

American Watersports

Tuesday--Saturday

Located on the beach of the Sea Gardens Beach Resort, there are fun things to rent for the whole family. They offer rentals for kayaks, jetskis, and even parasails! Enjoy the water upclose or from a bird’s eye view! No matter what activity you’re enjoying, be sure to protect yourself and your family from the sun’s powerful rays and apply plenty of sun block!

15th Street Boat Company

Monday --Saturday

15th Street Boat Company offers rental boats of all kinds. They’re sure to have what you are looking for, whether it’s a small boat for a quick and simple outing or an extravagent boat with comfortable seats with a stereo(立体声) and high tech navigation(导航). You can rent a boat for half a day, a couple days, or even weeks at a time. If you want it, they’ve got it. It’s fun for everyone! 

Coconut’s Watersports

9 a.m.-5 p.m. Monday through Sunday

Coconuts Water Sports is open 7 days a week for your convenience and offers tons of water fun for the whole family. Jet ski activities last 30 minutes or 1 hour and can make stops along the way. You must be at least 14 years of age to ride alone and can be as young as 3 to ride along with an adult. Everybody is required to wear a life jacket and a license is required to operate the jet ski. Bathing suits and shorts are recommended. 

Jet Ski Tours of Miami

Thursday-Sunday 10 a.m.-7p.m.

Jet Ski Tours of Miami includes onsite parking, indoor restrooms, lockers, and life jackets for participants. You may choose a one or two hour tour and each jet ski can hold up to 3 people. You must be at least 18 years old in order to ride. As long as you are accompanied by an adult, there is no age limitation for any passenger. There is a restaurant nearby to eat at. The tour visits 6 different islands and passes by Bayside and Hard Rock. You may even catch a glimpse of dolphins playing or a manatee resting in these fabulous Florida waters.

小题1:What activity is convenient for the visitors to have lunch?

A．Jet Ski Tours of Miami

B．Coconut’s Watersports

C．15th Street Boat Company

D．American Watersports小题2:To satisfy your son’s curiosity about marine animals, you ___________.

A．will rent a boat to ride with him.

B．prefer an extravagant (奢侈的) boat with comfortable seats with a stereo.

C．would like to prefer American Watersports to Florida waters.

D．can choose the tour to Bayside and Hard Rock.小题3: If you like to sail a boat, you can________.

A．go to the Sea Gardens Beach Resort

B．visit 15th Street Boat Company

C．choose Jet Ski Tours of Miami

D．go to Coconut’s Watersports小题4:To ride alone in the jet ski activities, _____________.

A．you have to be at least 14 years old.

B．you can choose to wear a life jacket or not.

C．you must be over18 years old.

D．you have to be with parents.

男性，26岁，左膝持续性隐痛1个月余。查体：左小腿上端内侧略肿，压痛，X线摄片见左胫骨上端内侧有一肥皂泡样的阴影，膨胀性生长，骨皮质变薄。

如果是骨肉瘤，其最佳治疗方案为

A．单纯化疗
B．单纯放疗
C．单纯截肢手术
D．肿瘤切除，人工关节置换
E．化疗-肿瘤切除-化疗

【选修3物质结构与性质】（15分）

VIA族的氧、硫、硒(Se)、碲(Te)等元素在化合物中常表现出多种氧化态，含VIA族元素的化台物在研究和生产中有许多重要用途。请回答下列问题：

（1）S单质的常见形式为S₈，其环状结构如下图所示，S原子采用的轨道杂化方式是      ；

（2）原子的第一电离能是指气态电中性基态原子失去一个电子转化为气态基态正离

子所需要的最低能量，O、S、Se原子的第一电离能由大到小的顺序为               ；

（3）Se原子序数为       ，其核外M层电子的排布式为                    ；

（4）H₂Se的酸性比H₂S         （填“强”或“弱”）。气态SeO₃分子的立体构型

为                 ，SO₃^2-离子的立体构型为                   ；

（5）H₂SeO₃的K₁和K₂分别为2.7x l0^-3和2.5x l0^-8，H₂SeO₄第一步几乎完全电离，

K₂为1.2X10^-2，请根据结构与性质的关系解释：

①H₂SeO₃和H₂SeO₄第一步电离程度大于第二步电离的原因：                          

                                                   ；

② H₂SeO₄比 H₂SeO₃酸性强的原因：                                                  

（6）ZnS在荧光体、光导体材料、涂料、颜料等行业中应用广泛。立方ZnS晶体结构如下图所示，其晶胞边长为540.0 pm．密度为                    （列式并计算），a位置S^2-离子与b位置Zn²⁺离子之间的距离为               pm（列示表示）

A.条件（1）充分，但条件（2）不充分.

B.条件（2）充分，但条件（1）不充分.

C.条件（1）和（2）单独都不充分，但条件（1）和条件（2）联合起来充分.

D.条件（1）充分，条件（2）也充分.

E.条件（1）和（2）单独都不充分，条件（1）和条件（2）联合起来也不充分.

如图6-82，△ABC中，∠BAC=90°，以AB为直径的圆交BC于D，则图中阴影部分的面积为。

(1)AB=2； (2)AC=2．