根尖结构中具有分裂增生能力的是（ ） A．根冠 B．分生区 C．伸长区 D．成熟

现有4个纯合南瓜品种，其中2个品种的果形表现为圆形(圆甲和圆乙)，1个表现为扁盘形(扁盘)，1个表现为长形(长)。用这4个南瓜品种做了3个实验，结果如下：

实验1：圆甲×圆乙，F₁为扁盘，F₂中扁盘：圆：长=9：6：1

实验2：扁盘×长，F₁为扁盘，F₂中扁盘：圆：长=9：6：1

实验3：用长形品种植株的花粉分别对上述两个杂交组合的F1植株授粉，其后代中扁盘:圆:长均等于1：2：1。综合上述实验结果，请回答：

(1)南瓜果形的遗传受______对等位基因控制，且遵循______定律。

(2)若果形由一对等位基因控制用A、a表示，若由两对等位基因控制用A、a和B、b表示，以此类推，则圆形的基因型应为______，扁盘的基因型应为______，长形的基因型应为____________。

(3)为了验证(1)中的结论，可用长形品种植株的花粉对实验1得到的F₂植株授粉，单株收获F₂中扁盘果实的种子，每株的所有种子单独种植在一起可得到一个株系。观察多个这样的株系，则所有株系中，理论上有1/9的株系F₃果形均表现为扁盘，有____的株系F₃果形的表现型及其数量比为扁盘：圆=1：1，有___的株系F₃果形的表现型及其数量比为_________。

After a year of preparing herself, Laura Dekker has been given permission to sail around the world. “I was so happy that I almost jumped into the river,” Laura said, after learning of the court’s verdict(判决).

The 14-year-old was born on a ship in the South Pacific, and currently lives with her father on a boat. When child protection agencies heard about her plan to sail alone, they took the case to court and prevented her from making such a dangerous voyage.

Since the decision, though, Laura had been preparing with her father to convince the court that she was ready. Later on, she received the books and other materials she would need for school while she was at sea. She added safety equipment to a new, big ship. And she took her first aid course to learn several survival skills, like how to put out fires on the boat, take care of her own injuries and deal with lack of sleep. She also planned a safer course --- adding alternate routes(备用路径) to avoid pirate attacks, and planning a course that would have her on dry land as she moved from port to port across the globe.

Even with all of the added preparations, the trip still has its risks. In early June, 16-year-old Abby Sunderland, an American, had to abandon(放弃) her attempt to become the youngest sailor to travel around the world. Her ship’s mast(桅杆) broke due to rough waters in the Indian Ocean, and she was rescued by a French fishing ship.

Laura plans to take longer than Abby for her voyage, and is using a larger and more stable boat. If she finished successfully in less than two years, she will take the title from current record-holder Jessica Watson, of Australia, who was 16 when she completed the journey.

小题1:Which of the following is TRUE of Laura?

A．She prepared the voyage at the age of 12.

B．She lost her mother after she was born.

C．She was allowed to sail around the world finally.

D．She wanted to donate money made from the voyage.小题2:At first, child protection agencies were against Laura’s plan because ____.

A．it was considered to be a dangerous trip

B．Laura had to finish her schooling first

C．it would cost Laura too much time and money

D．Laura wasn’t prepared for the sailing alone小题3:What is Mr. Dekker’s attitude towards Laura’s trip?

A．Doubtful

B．Supportive

C．Uncertain

D．Neutral(中立的)小题4:Paragraph 3 mainly talks about ____.

A．how Laura convinced the court

B．why Laura needed to study at sea

C．how Laura prepared for the voyage

D．where Laura could avoid pirate attacks小题5: The person who keeps the record comes from ____.

A．Holland

B．America

C．India

D．Australia

下列关于带下过多正确的治疗选方是

A．肾阳虚证：治以温肾培元，固涩止带，方选内补丸

B．湿热下注证：治以清热利湿，方选八正散

C．热毒蕴结证：治以清热解毒，方选五味消毒饮

D．脾虚证：治以健脾益气，升阳除湿，方选完带汤

E．阴虚夹湿证：治以养阴清热、利湿止带，方选大补阴丸加减

观花植物在花芽分化时，应考虑施用（ ）。

A．氮肥

B．磷肥

C．钾肥

下列最不易导致牙周脓肿的因素是（）

A.深牙周袋

B.Ⅱ度根分叉病变

C.牙龈损伤

D.Ⅲ度根分叉病变

E.髓室底穿孔