刚充完电的蓄电池，在电解液未降到常温时就可以用放电计检查。

I had just gone to bed after a very hard day when the phone rang. It was an eccentric(怪僻的)farmer. I had never met him before although, I had often heard people talk about him. He sounded quite nervous and he had been talking for a minute or so before I understood anything. Even then all I could make out was that someone called Milly had had a very bad accident. I had not the slightest idea who she was but I obviously had to go.

It had been snowing heavily that day and I did not know the way. I had been driving for at least an hour when I finally found his place. He was standing there, waiting for me. It seemed Milly had died. “She meant more to me than anyone…even my wife!” he said. I could see that he had been crying. I thought something terrible had taken place, a possible scandal(丑闻). I was even more shocked when he told me he had put her in the barn(厩). “I wouldn't leave her out in the cold!” he said.

Milly had clearly been a secret lover of his. I was about to tell him he could not expect me to cover anything up when he opened the barn door. He lifted his candle and I saw a dark figure on the ground. “She was such a good cow! I wouldn't let anyone but a doctor touch her!” he said, and burst into tears again.

小题1:The underlined phrase make out in the first paragraph means _____.

A．expect

B．understand

C．see clearly

D．hear clearly小题2:Before he arrived at the farmer's house, the writer expected to see Milly lying _____.

A．on the ground of a barn

B．on the floor of a room

C．in bed in a room

D．in bed in a barn小题3:What do we know about Milly from the story?

A．She had met with an accident.

B．She had caused a scandal.

C．She was seriously ill

D．She was hidden somewhere.小题4:The farmer wished that the writer might _____.

A．look into the matter

B．bring Milly back to life

C．free him from a scandal

D．keep the whole thing a secret小题5:The person who told the story is probably a _____.

A．farmer

B．policeman

C．country doctor

D．newspaper reporter

某校物理兴趣小组设计了一种“电子秤”，实际上是压力测量仪，用它来称量物体的重力，其原理结构如图所示。图中A为金属片，B为金属板，R₁=24Ω，R₂是阻值最大值为72Ω的滑动变阻器，电源电压为12V不变。则图中物重表应该用 ________（电流表/电压表）；当称量物体的重力达到最大值时，R₂两端的电压为________V。

出料加工与来料加工一样都是我国目前鼓励发展的加工贸易形式。

高速单级齿轮箱中，油液应浸没最下面的一个齿，可以超过齿根。

某市一栋综合楼，地下共4层，地上共20层，采用框架剪力墙结构，总建筑面积30万m²，主楼与其裙房之间设有防火墙等防火分隔设施，主楼各层建筑面积均大于1000m²。该综合楼总平面布局及周边民用建筑等相关信息如图1所示。该综合楼地下3、4层均为人防层，其主要使用功能均为普通汽车库、复式汽车库和储存可燃固体的库房；地下2层主要使用功能为展览厅、管理用房及燃气锅炉房、柴油发电机房、变压器室、配电室、消防泵房等设备用房；地下1层主要使用功能为消防控制室、管理用房及商场营业厅。主楼首层主要使用功能为门厅、咖啡厅、自助餐厅、商场营业厅，地上2、3层主要使用功能为儿童游乐厅、展览厅、商场营业厅，地上4～19层主要使用功能为办公室，地上20层主要使用功能为会议厅、多功能厅。裙房1～6层主要使用功能为商场营业厅。该建筑按有关国家工程建设消防技术标准配置了室内外消火栓给水系统、自动喷水灭火系统和火灾自动报警系统等消防设施及器材。

根据以上场景，回答下列问题。

消防水泵的启动方式分为哪几种？