下列说法中，正确的是（　　）

   My name is Chen Lan. My home is in Gulangyu. Do you know it? It is in Xiamen. It is near the sea(海). Gulangyu is a small place，but it is very nice and clean. There are no cars，no buses. People only walk. So it is very quiet.
   Our house is in the middle of Gulangyu. Behind our house there is a big old tree. My grandfather tells me that the tree is very，very old. There are many birds in the tree. We call it a “bird tree”. Our house is near the sea. The sea is big and blue. There are a lot of fish in the sea. After school，I go there and catch(捉) fish with my friends. It is very interesting. I like fish and I like catching fish.

猎豹快速奔跑是长处，羚羊灵活跳越是长处，大树参天、小草铺地也是长处：每个生命都有长处。聪明好学是长处，朴实勤劳是长处，孝敬父母、善于合作也是长处：每个人都有长处。每一种长处都值得我们欣赏。

请以“长处”为话题，写一篇文章。题目自拟，但不得直接以话题为题目。要求：①请先写出完整的题目。②文体不限；不少于600字。③文中不得出现真实的人名、校名、地名。

实验桌上放着晶体二极管、电阻、电容器各一只，性能均正常，外形十分相似．现将多用电表选择开关拨到“×100”挡，分别测它们的正、负电阻加以鉴别：测甲元件时，R_正＝R_负＝0.5 kΩ；测乙元件时，R_正＝0.5 kΩ，R_反＝100 kΩ；测丙元件时，开始指针偏转到0.5 kΩ，接着读数逐渐增大，最后停在100 kΩ上．则甲、乙、丙三个元件分别是(　　)