测量你身高时，应选用（） A．最小刻度是mm的米尺 B．最_爱下问搜题

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问题选择题

测量你身高时，应选用（　　）

A．最小刻度是mm的米尺

B．最小刻度是cm的3m软尺

C．最小刻度为mm的2m直尺

D．最小刻度为mm米的2m卷尺

答案

A、最小刻度是mm的米尺，不能满足测量人体身高的量程需要，所以该选项不符合题意；

B、最小刻度是cm的3m软尺，虽然量程能满足需要，但分度值过大，不符合精确度要求，所以该选项不符合题意；

C、最小刻度为mm的2m直尺，既能满足量程需要，又能满足精确度要求，还便于测量，所以该选项符合题意；

D、最小刻度为mm的2m卷尺，既能满足量程需要，又能满足精确度要求，但是不便于测量，所以该选项不符合题意；

故选C．

完形填空

People on a college campus were more likely to give money to the March of Dimes if they were asked for a donation by a disabled woman in a wheelchair than if asked by a nondisabled woman. In another        , subway riders in New York saw a man carrying a stick stumble（绊脚） and fall to the floor. Sometimes the victim had a large red birthmark on his      ; sometimes he did not. In this situation, the victim was more likely to         aid if his face was spotless than if he had an unattractive birthmark. In         these and other research findings, two themes are         : we are more willing to help people we like for some reason and people we think     assistance.
In some situations, those who are physically attractive are more likely to receive aid.       , in a field study researchers placed a completed application to graduate school in a telephone box at the airport. The application was ready to be        , but had apparently been "lost". The photo attached to the application was sometimes that of a very          person and sometimes that of a less attractive person. The measure of helping was whether the individual who found the envelope actually mailed it or not. Results showed that people were more likely to        the application if the person in the photo was physically attractive.
The degree of      between the potential helper and the person in need is also important. For example, people are more likely to help a stranger who is from the same country rather than a foreigner. In one study, shoppers on a busy street in Scotland were more likely to help a person wearing a(n)           T-shirt than a person wearing a T-shirt printed with offensive words.
Whether a person receives help depends in part on the "worth" of the case. For example, shoppers in a supermarket were more likely to give someone.        to buy milk rather than to buy cookies, probably because milk is thought more essential for        than cookies. Passengers on a New York subway were more likely to help a man who fell to the ground if he appeared to be         rather than drunk.

A．challenging

C．understanding

C．In addition

D．For example

B．good-looking

D．hard-working

C．cooperation

B．instructions

问答题案例分析题

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？