一个铝质三角形框架三条边长分别为24cm、30cm、36cm,要做一个与它相似的

题型:选择题

问题:

一个铝质三角形框架三条边长分别为24cm、30cm、36cm,要做一个与它相似的铝质三角形框架,现有长为27cm、45cm的两根铝材,要求以其中的一根为一边,从另一根上截下两段(允许有余料)作为另外两边,截法有[ ]

A.0种

B.1种

C.2种

D.3种

考点:相似三角形的应用
题型:选择题

Usually, students are not encouraged to run or jump around in the corridor (走廊). However,students in a British grammar school really enjoy running on the corridor tiles (瓷砖) and their teachers even encourage them to do that.

Why? It is because the corridor was built with special kinetic (动能的) tiles. When students jump on the tiles, electricity will be generated ( 产生). After one year, the electricity generated from the tiles can fully charge 853 mobile phones or power(供电) an electric car to drive seven miles. It’s amazing, isn’t it?

The corridor tiles are really a brilliant invention. Students can not only play on the corridor,but also help power the lights in their school corridors and other devices ( 设备) in their classrooms. Besides, this is a good way to teach students to be creative. They will be inspired to be scientists, inventors and engineers in the future to find clean energy for all humans.

The inventor of the magic corridor tiles is Laurence Kemball-Cook. He was once a student in this school. Now, he is CEO of his own company. The corridor tiles are not Laurence’s only invention. He has also invented a special dance floor, which can be used at music festivals. It allows dancers to charge their mobile phones while they are dancing on the dance floor.

小题1:Why do the students in the passage enjoy running on the corridor tiles?

A. Because the corridor tiles are expensive.

B. Because the teachers ask them to do that.

C. Because the corridor was built with special tiles.

小题2:After one year, the electricity generated from the tiles can provide enough energy for _______.

A. over 800 mobile phones

B. all the lights of the school

C. an electric car to drive70 miles

小题3:The underlined word “inspired” most probably means “ _________”.

A. encouraged

B. forced

C. trained

小题4:What else has Laurence invented besides the corridor tiles from the passage?

A. A mobile phone.

B. A music player.

C. A special dance floor.

小题5:According to the passage, which of the following statements is TRUE?

A. Students are not allowed to walk in the corridor.

B. Laurence once studied in the British grammar school.

C. Laurence has more than one company of his own.

题型:选择题

喘证严重者的表现

A.脉大无根

B.喘促持续不解

C.烦躁不安

D.面青唇紫

E.肢冷汗出如珠

题型:选择题

女性,34岁。月经量增多半年,皮肤瘀点、瘀斑2月就诊。检验:Hb90g/L,WBC8.9×109/L,血小板42×109/L,血小板相关抗体阳性()

A.出血时间延长,凝血时间正常,血块退缩不佳,凝血酶时间正常

B.出血时间正常,凝血时间延长,血块退缩正常,凝血酶时间正常

C.出血时间延长,凝血时间延长,血块退缩不佳,凝血酶时间延长

D.出血时间延长,凝血时间正常,血块退缩正常,凝血酶时间正常

E.出血时间正常,凝血时间正常,血块退缩不佳,凝血酶时间延长下列出血性疾病,可能出现哪组实验室检查的异常。

题型:选择题

腕管综合征受压并引起临床症状的组织是()

A.正中神经

B.桡神经

C.尺神经

D.腋神经

E.腕骨

题型:选择题

对于建筑高度大于100m的民用建筑与相邻建筑的防火间距,当符合规范允许减少的条件时,()。

A.在规范基础上减少2m

B.在规范基础上减少4m

C.在规范基础上减少不超过25%

D.仍不应减少

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