茶叶厂用甲、乙两台包装机分装质量为400克的茶叶,从它们各自分装的茶叶中分别随机

题型:选择题

问题:

茶叶厂用甲、乙两台包装机分装质量为400克的茶叶,从它们各自分装的茶叶中分别随机抽取10盒,测得它们实际质量的平均数和标准差分别如表所示,则包装茶叶质量较稳定的包装机为(   )
甲包装机乙包装机
平均数(克)400400
标准差(克)5.82.4
A.甲B.乙C.甲和乙D.无法确定
考点:平均数方差
题型:选择题

All residents: Rules for living in Parkrise Flats

We all want to live comfortably and safely here, so here are a few simple rules which we think all residents should follow.

Rubbish

Rubbish collection is on Tuesdays. Please do not leave rubbish bags out before Tuesday as birds and animals can break into them and they smell.

Washing

There is a washing line for every flat in the garden next to the car park. Please only dry your washing on these lines so it does not disturb(干扰)people in the ground floor flats.

Cleaning

The main stairs are cleaned twice a week by the Association, so please try to keep them tidy and clean and do not leave furniture or bags on the stairs or in the hallways.

Lights

The main lights are on a timer and they stay on for five minutes whey you press them. Please tell the Association if any lights are not working.

Noise

Residents are asked to keep noise to a minimum. Loud music, etc. can disturb other people and the Association will get in touch with you if you make too much noise.

Safety

Make sure the main outside door is always locked and do not let anyone in to the main building unless you know who they are. Sometimes people try to get in to the main stairs and then break into flats, so do not let people in unless they are coming to see you.

Parking

Each flat has one car parking space. These are numbered and are at the back of the building. Do not use another resident's space. If you have more than one car you will have to park it on the road. Do not park where you are blocking entrances.

Problems

If you have any problems or questions, please call the Association at 0800 096 9000.

Parkrise Housing Association

小题1:What's the purpose of the text?

A.To list the services offered by the Association.

B.To make an advertisement for the flats.

C.To ask the residents to follow the rules.

D.To warn people against possible dangers.小题2: According to the text, which of the following is done once a week?

A.Rubbish collections.

B.Drying the washing.

C.Cleaning the main stairs.

D.Changing the lights.小题3: People should dry their washing on the watching lines ______.

A.at the car park

B.in the ground floor flats

C.in the h allways

D.in the garden小题4: The Association will talk with you if ______.

A.lights are not working

B.you make too much noise

C.you let strange people in

D.you park your car on the road小题5: It can be learned from the text that ______.

A.people should leave the broken chairs on the stairs

B.the Association is always ready to help the residents

C.one can park the car at any numbered parking space

D.the lights will be on whenever you pass the main stairs

题型:选择题

在某台Cisco路由器OSPF配置模式下,定义参与OSPF的子网地址,错误的配置是()。

A.network 123.149.65.7 0.0.0.0 area 0

B.area 5 range 215.93.67.0 0.0.0.255

C.network 139.18.0.0 0.0.0.255 area 1

D.area 3 range 198.65.184.0 255.255.255.0

题型:选择题

下列变化,属于化学变化的是(  )

A.冰变为水

B.酒精燃烧

C.锅炉爆炸

D.矿石粉碎

题型:选择题

PCI总线属于()。

A.片内总线

B.元件级总线

C.内总线

D.外总线

题型:选择题

质量管理体系审核员注册申请人需满足20天的现场审核经历。

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