由神经外胚层发育而来的有（） A.视网膜 B.晶状体 C.瞳孔括约肌 D.虹膜上皮

如图所示的电路中，电源电压U保持不变，电流表A₁示数与电流表A₂示数之比为3:2，若R_l＝6 Ω，则R₂ 应为________Ω  ．

其他椴树（欧椴）花及叶

在下列各过程中，能量转化形式是：

（1）拉弯的弓把箭射出去                                          ；

（2）秋千从低处荡向高处                                          ；

（3）冰雹从天而降                                                    ；

（4）向上抛出的石块在空中先上升后下降                                                            。

根据《民法通则》（）可以成为民事法律关系的主体。

A、公民

B、法人

C、个体工商户

D、联营组织

阅读理解（共20小题；每小题2分，满分40分）

第一节：（共15小题，每小题2分，满分30分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

When she flew into Athens on an unseasonably cold day in September, she quickly realized that she hadn’t brought enough warm clothes. Walking through the streets of the Greek capital, she happened to see a nice coat in a shop window and went in to ask about the price. The coat was too expensive, but as Christine was about to leave the shop, the woman asked her where she was from. When Christine answered Australia, the woman agreed to reduce the price because she knew a nice girl from Australia called Elena. Christine then noticed a photo of a young man standing next to a motorbike. Her eyes opened wide with astonishment. It was Nicos! Indeed the young man was Nicos, and the woman in the shop was Maria. She had come to Athens from Santorini to look after the shop for a friend.

Sadly, the story has a tragic ending. Nicos had been killed in a motorcycle accident.

“I wanted to tell Elena,” said Maria. “But I didn’t know how. Now that I have met you, I know that it’s time to tell her.”

小题1:Elena went to Greece in order to visit        .

A．her parents

B．Christine

C．Nicos.

D．her grandparents小题2:Why did Nicos stop writing to Elena?

A．He had moved away.

B．His mother forbade him to do so.

C．He h ad died in an accident.

D．They had lost touch with each other.小题3:What can be inferred from the fact that Christine and Maria had a talk in the shop?

A．They two had planned the talk before.

B．They met each other accidentally.

C．They were business partners.

D．They recognized each other.