钢板筒仓按安装方法可划分为：（）、（）、（）和（）筒仓。

Billy and Sam were twins. They were in the same class. They were both very happy. One day their teacher asked the class to write a composition(作文)“My Mother”. Sam wrote one, but Billy was lazy. He just copied his brother’s.  The next day, the teacher asked Billy why his composition was the same as Sam’s. “We have the same mother, don’t we?”answered Billy.

根据短文内容判断句子正误，正确的填T，错误的填F。

小题1:Sam was older than Billy.

小题2:Sam and Billy were in different classes

小题3:The name of the composition was “My Mother”

小题4:Billy’s composition was the same as Sam’s

小题5:Billy was not lazy. He was very clever

随着第二次工业革命的进行，主要资本主义国家的工业结构发生的最大变化是[ ]

A．重工业占主导地位

B．交通运输业获得巨大发展

C．化学工业兴起

D．电力工业的发展最为突出

目前，我国公民可以直接参与的选举活动有

①市级政府成员的选举   ②居民委员会的选举

③市级人大代表的选举   ④县级人大代表的选举

A．①②

B．①③

C．②③

D．②④

小学教师应该具有教育观念的内容主要有哪些？

（）是指原有企业所具有的产品商标信誉和用户的忠诚性。

A、产品差异优势

B、产品忠诚度

C、产品品牌优势

D、产品知名度