Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however （）.

相似题目

• Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）

  A . Carbon dioxide is corrosive when exposed to fire B . Carbon dioxide should be applied slowly to a large engine room fire C . Its total cooling effect is far greater than water D . Its smothering effect is excellent for class B fire

  查看最佳答案

• Which parameter can be tuned to affect the selection of a static route as a backup.when a dynamic protocol is also being used?（）

  A . link bandwidth B . hop count C . link cost D . administrative distance E . link delay

  查看最佳答案

• When a staging server is used as an environment for testing new data in a default WebSphere Commerce installation， which of the following are true about the staging server？（）

  A . The database has a subset of the tables in the production server database. B . The database has a copy of selected data from the production database C . The database logs changes for later propagation. D . The database is accessed as read-only to prevent data corruption. E . The database includes all user and order data for offline processing.

  查看最佳答案

• As per UCP600, the words “to”, “till”, “from”, “between” when used to determine a period of shipment include the date or dates mentioned, the words “before” and “after” exclude the date mentioned. （）

  A . 正确 B . 错误

  查看最佳答案

• When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.

  A . the meridian through the object of the bearing B . the meridian through the ship's position C . the meridian midway between the ship and the object D . any meridia

  查看最佳答案

• Which method must be used to encode a URL passed as an argument to HttpServletResponse.sendRedirect when using URL rewriting for session tracking？（）

  A . ServletResponse.encodeURL B . HttpServletResponse.encodeURL C . ServletResponse.encodeRedirectURL D . HttpServletResponse.encodeRedirectURL

  查看最佳答案

• Which two options can be used as traffic descriptors when classifying and marking traffic？ （）

  A . incoming interface B . Layer 2 differentiated services code point （DSCP） C . Layer 3 IP precedence D . outgoing interface

  查看最佳答案

• when （），the provisions of the Bill of Lading will be used as a basis for settlement.

  A . an event is in connection with the marine peril at sea B . a matter is linked to a person injury C . a fact is being contacted by Charter Party D . a case is related to dispute about cargo

  查看最佳答案

• What are the two reasons for the appearance of 0.0.0.0 as the next hop for a network when using the "show ip bgp" c ommand?（）

  A . The network was originated via redistribution of an interior gateway protocol into BGP. B . The network was defined by a static route. C . The network was learned via IBGP. D . The network was learned via EBGP. E . The network was originated via a network or aggregate command.

  查看最佳答案

• An operational amplifier, as used in todays consoles, has a calculated gain of 5This means that when the input changes （）

  A . 5 volts, the output changes 10 volts B . 10 volts, the output changes 5 volts C . 2 volts, the output changes 10 volts D . 10 volts, the output changes 2 volt

  查看最佳答案

• When executing the massload command to load catalog data into a WebSphere Commerce database on a remote DB2 server，which of the following can be used as valid values for the -method command line parameter？（）

  A . create B . import C . load D . sqlimport E . update

  查看最佳答案

• When（）,the provision of the bill of lading will be used as a basis for settlement.

  A . an event is in connection with the marine peril at sea B . a matter is linked to a person injury C . a fact is being contacted by charter party D . a case is related to dispute about cargo

  查看最佳答案

• When a switch port is used as a VLAN trunk, which of the following trunk modes are valid?（）

  A . Blocking B . Auto C . Desirable D . On E . Transparent F . Learning

  查看最佳答案

• When creating a Consumer Direct store in WebSphere Commerce Professional Edition， which organization will be used as the store owner？（）

  A . Default Organization B . Merchant Organization C . Root Organization D . Seller Organization E . Store Organizatio

  查看最佳答案

• When creating a role in a Cisco Nexus 7000 Series Switch， rules are used to define the type of operations that a role will allow the user to perform.  Which two of these parameters cannot be applied as a rule？ （） 

  A .  port-profile B .  command C .  access-list D .  feature-group E .  OID

  查看最佳答案

• As our foreign teachers’ suggest, when you deliver a speech, you’d better use your own personal experiences to show your own opinions.____________

  查看最佳答案

• It is wise to use __________ sentences in formal situations, such as when interviewing for a job. (grammar)

  查看最佳答案

• 1.We should use as many props as possible when giving a speech to make it vivid and dynamic.

  查看最佳答案

• To us it seems so natural to put up an umbrella to keep the water off when it rains. But actually the umbrella was not invented as protection against rain. Its first use was as a shade against the sun.

  Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, way back in the eleventh century B.C. We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use: it became a symbol of honor and authority. In the Far East in ancient times, the umbrella was allowed to be used only by royalty or by those in high office. In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in common use in ancient Greece. But it is believed that the first persons in Europe to use the umbrella as protection against the rain were the ancient Romans. During the Middle Ages, the use of the umbrella practically disappeared. Then it appeared again in Italy in the late sixteenth century. And again it was considered a symbol of power and authority. By 1680, The umbrella appeared in France, and later on in England. By the eighteenth century, the umbrella was used against rain throughout most of Europe. Umbrellas have not changed much in style. during all this time, though they have become much lighter in weight. It wasn't until the twentieth century that women's umbrellas began to be made, in a whole variety of colors. The first use of umbrella was as ______. A．protection against rain B．a shade against the sun C．a symbol of power D．a symbol of honor

  查看最佳答案

• Try to avoid the habit of using possessive pronouns when describing coworkers, such as my assistant.()

  此题为判断题(对，错)。

  查看最佳答案

• In order to approve a project, management using simple, as well as complex, sophisticated tools to determine how the project fits into it’s strategic plan. When the project selection includes an in-depth analysis, using complex, sophisticated tools, is os considered to be part of what project phase？

  A.Implementation B.Termination C.Conceptual D.Operational E.None of the above

  查看最佳答案

• When the relief valve is used as a constant pressure valve, it is connected to the outlet of the hydraulic pump to ensure that the outlet pressure of the hydraulic system (pump) is constant.

  A:正确; B:错误

  查看最佳答案

• “Sorry” is used as an advance apology for troubling somebody, as when passing in front of him or interrupting his conversation.（）

  是 否

  查看最佳答案