MIP.watch('count', function (newVal, oldVal) { fetch('http://www.chazidian.com/kaoshi/ajaxapi/?action=guanzhu&id=142200&type=2') .then(function (res) { var follows2 = MIP.getData('follows') if(follows2==1){ MIP.setData({ follows:2, title:'收藏' }) } if(follows2==2){ console.log(2) MIP.setData({ follows:1, title:'已收藏' }) } }) .catch(function (err) { console.log('数据请求失败!') }) })

按照居民门牌号,机械地每隔4户抽取一户的抽样方法是

A、系统抽样
B、多级抽样
C、整群抽样
D、单纯随机抽样
E、分层抽样
查看答案
正确答案:

C

答案解析:

暂无解析

上一题
你可能感兴趣的试题

NeitherEnglishnorChinese________difficulttolearn.

A、has
B、have
C、is
D、are

Youcansterilizeaneedlebyholdingitina___________.

A、flame
B、fire
C、blaze
D、conflagration

Wearewaiting______yourreply______ourletter.

A、----,of
B、for,to
C、----of,of
D、----,----

WhichofthefollowingisnotmentionedasWTO'sobjective?

A、Tofacilitate,intravel,people'saccesstoeducationandculture
B、Toactasaninternationalagencyofcoordinationandcooperationtospreadtourism
C、Toavoiddiscriminationbetweencontractingcountries
D、Toimprovetheconditionsofcountrydwellersandsotocontributetoanexpandingworldeconomy

Thegirlwasluckyenoughto_______thebadmenandranaway.

A、breakaway
B、breakawayfrom
C、breakout
D、breakinto
热门试题 更多>
相关题库更多>
第一单元
第二单元