植物的根向下生长，从土壤中吸收______和______；茎向上生长，并长出绿叶

患者死亡，医患双方当事人不能确定死因的，应当在患者死亡后多长时间内进行尸检（）

A.12小时

B.24小时

C.48小时

D.72小时

E.7天

 FeSO₄·7H₂O广泛用于医药和工业领域，以下是FeSO₄·7H₂O的实验室制备流程图。根据题意完成下列填空

（1）操作①中碳酸钠溶液能除去油污，原因是____________ （用离子方程式表示）。

（2）下列物质分离方法的原理与过滤相同的是________(填序号字母)。

a.蒸馏     b.分液      c.渗析      d.重结晶

（3）FeSO₄·7H₂O是某些补血剂的主要成分，实验室中为测定某补血剂中铁元素的含量，进行了以下实验：

①配制100mL1.00×10^-2mol·L^-1的KMnO₄溶液，所用的仪器有天平、烧杯、胶头滴管及_________。配制过程中下列说法中，正确的是___________ (填序号字母)。

a. KMnO₄溶于水不放热，可以直接在容量瓶中溶解

b.容量瓶洗涤后不需干燥即可直接用于实验

c.定容后摇匀，凹液面低于刻度线，再加水至凹液面最低点与刻度线相平

d.如果定容时加水超过刻度线必须重新配制

②取2.0g克该补血剂配成溶液，进行预处理，使其中的铁元素全都是Fe²⁺，再用配制好的标准KMnO₄溶液在酸性条件下进行氧化还原滴定，反应的离子方程式是：5Fe²⁺+MnO₄^-+8H⁺ = 5Fe³⁺+Mn²⁺+4H₂O。进行滴定时，标准KMnO₄溶液应该盛放在_________（填“酸式”或“碱式”之一）滴定管中，原因是______________________。

③滴定结束时，消耗浓度为1.00×10^-2mol·L^-1的标准KMnO₄溶液26.00mL，则该补血剂中铁元素的含量为__________ %。

It’s three devices in one.

iPhone is more than just a phone.                              

It combines three devices in one:

a revolutionary mobile phone, a widescreen iPod,

and a breakthrough Internet device.

All that and more makes it the best phone you’ll ever use.

Revolutionary Phone

With the Multi-Touch interface on iPhone, you can make a call simply by tapping a name or number in your contacts or favorites list, your call log, or just about anywhere. Visual(视觉的) Voicemail lets you select and listen to messages in whatever order you want — just like email.

Widescreen iPod

iPhone shows off your content — music, movies, TV shows, and more — on a beautiful 3.5-inch display. Add to your collection by downloading music and video wirelessly from the iTunes Store. Moves through songs and playlists with the touch of a finger. Even browse(浏览)your album artwork using Cover Flow.

Breakthrough Internet Device

iPhone uses fast 3G and Wi-Fi wireless connections to deliver rich HTML email, Maps with GPS, and Safari — the most advanced web browser on a mobile device. It has Google and Yahoo! search built in. And since iPhone multitasks, you can make a phone call while emailing a photo or surfing the web over a Wi-Fi or 3G connection.

It opens a whole new world of applications.

iPhone comes with some amazing applications. And you can choose from thousands more on the Application Store and download them with a tap. Your iPhone gets even better with every new application. Play games. Be more productive. Keep yourself entertained. No matter what you want to do on iPhone, there’s an application for that.

It works like no other phone.

With iPhone, Apple combined innovative(创新的)hardware features with the world’s most advanced mobile operating system to redefine what a mobile phone can do. Applications work together perfectly and they are at the same pace with your computer—whether you’re on a Mac or a PC. From its revolutionary Multi-Touch display to its intelligent keyboard to its smart sensors, iPhone is years ahead of any other mobile phone.

1. How can you add your music, movies, TV shows to your collection on the phone?

A. By using Voicemail to select what you want to add.

B. By downloading them from the iTunes Store.

C. By adding a new application from thousands more on the Application Store.

D. By using Google and Yahoo! search to search and then add them.

2. Which of the following is true?

A. You can’t deliver HTML email, Maps with GPS, and call at the same time. 

B. Multi-Touch interface makes it easy to make a phone call.

C. You can only listen to the messages in the fixed order.

D. Wi-Fi is the most advanced web browser on a mobile device.

3. What makes iphone different from other mobile phones is that______.

A. it has a world of new applications

B. it is a Widescreen iPod

C. it contains Breakthrough Internet Device

D. it redefines what a mobile phone can do

电除尘器灰斗棚灰的原因（）。

A、有异物将出灰口堵死；

B、灰温降低，灰结露而形成板块；

C、热灰落入水封地的水中，形成蒸气上升到灰斗中，使受潮而形成块状棚灰；

D、灰斗坡度大。

新增工作班人员必须经（）进行安全交底并签名确认后方可参加现场作业。

A.工作负责人

B.工作许可人

C.工作票签发人

D.分管领导