肺癌最常见的组织学类型是( ) A．鳞状细胞癌 B．腺癌 C．小细胞癌 D．大细胞

常温下，下列各组粒子在指定溶液中能大量共存的是（　　）

A．pH=l的溶液中：CH₃CH₂OH、Cr₂O₇^2-、K⁺、SO₄^2-

B．NaHCO₃溶液中：

、CO₃^2-、Br^-、K⁺

C．加入铝粉放出大量H₂的溶液中：Fe²⁺、K⁺、Cl^-、NO₃^-

D．C（Ca²⁺）=0.1 mol•L^-1的溶液中：NH₄⁺、SiO₃^2-、CH₃COO^-、Br^-

What is logistics? In the current business environment,logistics is generally accepted as a very important element for the economic development and business growth of a region,especially a port city. In reality,what does logistics mean?In which way does it operate? For simple definition,logistics is a set of procedures in which commodity is delivered in an efficient manner from suppliers to customers.There are three key aspects to the concepts: 1．Movement of goods Goods can be considered as valuable objects,such as cargo and materials that are valua-ble and purchasable through commercial transactions and processes.Flow can be determined as methods in which goods are moved or transferred between locations,intermediaries and merchandisers.Modes of transportation include motor,rail,water,air and pipeline. 2.Direction of the flow of goods In the open market place,buyers and sellers represent two ends of a commercialtrans-action.Buyers are usually customers who demand the goods,while,as sellers are suppliers who provide such goods.When a transaction is agreed upon (sometimes payment is comple-ted,other times the payment is arranged to be completed at a later stage),the suppliers have the responsibility to arrange for the goods to be delivered to the customers. 3.Efficient management of the flow process The transportation of goods should bear low cost and ensure safety and punctuality.It should do its best to avoid wasting customers＇resources.Currently,the flow of goods is generally controlled by both hardware and software.By hardware,we mean logistics facili-ties and equipment,such as ports,warehouses and trucks,ships,railroad,cars and air-lines.By software,we mean information system,standardization and data sharing.Questions:

When a transaction is agreed upon，does every payment need to be completed？（）

A.Yes,completely.

B.Not neccessary.

C.Depen

D.Completed based on whatever suppliers need．

电流流过人体，造成对人体的伤害称为电伤。

皮带式给煤机检修时要注意：皮带两边的拉紧调节丝杆要使得皮带两边的拉紧或受力尽量均等，偏差不大于（）mm，否则在运行中将会使皮带跑偏

违反《建设工程安全生产管理条例》规定，施工单位使用未经验收或者验收不合格的（）的责令限期改正。

A.施工起重机械

B.整体提升脚手架

C.焊接设备

D.钢筋混凝土机械

E.自升式模板