根据短文内容判断句子正（T）误(F)。
Welcome to our school. Our school is on Xianyang Street. It’s next to the Xinhua Library. There is a big garden across from our school. The payphone is between our school and the post office. There are three buildings in our school, the students' building, the teachers'building and a library. The teachers in our school are good. Our school yard is very beautiful. If you come to our school from the airport, take a taxi and go along the highway until you see a bridge. Go across the bridge and turn left. Then go straight along the Bridge Street. Our school is on the right. 

金属材料具有诸多优点，用途广泛．

（1）地壳中含量最丰富的金属元素是____ ，但是它不是最先广泛使用的金属，其原因是____ ．

（2）通常情况下，一种金属的合金的熔点比这种纯金属的熔点____ ．

（3）不锈钢的主要成分是铁、铬、镍，由于其具有良好的____ 性，不锈钢被广泛用于制造医疗器械、反应釜、____ 等．

某电脑厂家为了安排台式电脑和手提电脑的生产比例，而进行一次市场调查，调查员在调查表中设计了下面几个问题，你认为哪个提问不合理（　　）

如图，在Rt△ABC中，∠ACB=90°，CD⊥AB，垂足为D，AB=c，∠A=α，则CD长为（　　）

鸦片战争前，一位中国文人这样描述西方人：“他们的长腿不能弯曲．因而他们不能奔跑和跳跃；他们碧蓝的眼睛畏惧阳光，甚至在中午不敢睁开。”就连林则徐也相信“只要断绝了对西方人茶叶和大黄的供应，他们就会因为消化不良而死”。造成这种认识的根源是（   ）