设备和机房具备哪些条件可实现无人值守？

阅读理解。

     My uncle has a great sports collection. He loves sports very much. And he loves all balls. He likes

playing basketball and volleyball. He also likes watching ballgames. How many balls does he have? He has

5 basketballs, 12 baseballs, 10 tennis rackets, 4 volleyballs and 14 baseball bats and many other balls.

1. _______  has a great sports collection.

A. My father

B. My grandfather

C. My uncle

D. My cousin

2. He loves _______  very much.

A. sports

B. music

C. balls

D. A and C

3. He likes playing _______  and _______.

A. volleyball; baseball

B. volleyball; basketball

C. basketball; baseball

D. soccer ball; tennis

4. He has _______  tennis rackets.

A. 5

B. 12

C. 10

D. 4

5. He has _______ soccer balls.

A. 5

B. 12

C. 10

D. we don't know

下列加粗成语运用不恰当的一项是[ ]

A．在知识不断更新的今天，努力学习是增强自身本领的不二法门。

B．扮演蔺相如的这个小演员，栩栩如生的演出展现了我国京剧艺术后继有人的兴旺景象。

C．一个人要做出点成绩，必须要有理想、有宽阔的视野及远见，没有远大理想的人一生将一事无成。

D．如果媒体不考虑报道后普通受众的心理，单纯为吸引眼球，就会做出断章取义的报道，从而加剧普通购房者的观望态度。

电动车因为具有轻便、快捷和环保等优点备受大家喜爱，下表是某型号电动自行车的相关数据．若骑车人的质量是60kg，在10min内连续行驶3km，根据相关信息求：

质量m/kg	40
行驶过程中轮胎与地面接触的总面积/m2	8×10-3
电能转化为机械能的效率	75%
工作电压U/V	32
速度v/（m•s-1）	≤10
骑车人质量60kg时的平均阻力F/N	20

（1）在行驶过程中，车对地面的压强是多大（g取10N/kg）．

（2）该电动自行车在10min内克服阻力所做的功．

（3）电动机所做的功．

降水对邻近建筑物有何影响？如何处理此影响？

简述制作直角三角形角钢架过程。