The voltage developed by an AC generator is controlled by varying the （）

A . AC voltage to the armature B . AC voltage to the field C . DC voltage to the armature D . DC voltage to the field

A . lifting capacity of the winch B . location of the boom C . position of the guy D . weight of the load

A . IMDG conference B . American Bureau of Shipping C . International Maritime Organization D . American Institute of Maritime Shipping

A . has kept pace with B . has kept pace to C . has made pace with D . has made pace to

A . prime mover speed B . exciter output voltage C . load on the alternator D . number of pole

A . varying the DC exciter voltage B . varying the reluctance of the air gap C . regulating the speed of the prime mover D . shorting out part of the armature winding

A . Remote Proxy B . Front Controller C . Service Activator D . Intercepting Filter E . Business Delegate

A . gas composition B . gas temperature C . pressure D . timing

A . lagging B . leading C . maximum D . minimum

A . Require the internal Web developers to use Telnet with Kerberos authentication. Require the consultants to use L2TP with IPSec B . Require the internal Web developers to use Encrypting File System （EFS） over Web Distributed Authoring and Versioning （WebDAV）. Require the consultants to use Microsoft.NET Passport authentication with Security Level 0 C . Require the internal Web developers to use Web Distributed Authoring and Versioning （WebDAV） over SSL.Require the consultants to use WebDAV over SSL D . Require the internal Web developers to use L2TP with IPSec. Require the consultants to use Encrypting File System （EFS） over Web Distributed Authoring and Versioning （WebDAV） E . Require the internal Web developers to use Web Distributed Authoring and Versioning （WebDAV） over SSL.Require the consultants to use L2TP with IPSec

A . sound the danger signal B . when taking action, make only course changes C . avoid altering course toward a vessel abaft the beam D . All of the above

A . residual magnetism B . voltage regulator C . electrical current for excitation D . the other running generator

A．Square Ａ. B．Square Ｂ. C．Square Ｃ. D．Square Ｄ.

A．A.whom B．B.which C．C.what D．D.that

Prince Henry lived in the fifteenth century. As a boy he became devoted to the sea, and he dedicated (devoted) himself" to improving the design of Ships and the methods or sailing them. In 1416, when he was twenty-two. Henry founded a school for mariners, to which he invited everyone who could help him —— Jewish astronomers, Italian and Spanish sailors, and Arab mathematicians and map makers who knew how to use the crude compass of the day and could improve it. Henry's goal was to design and equip vessels that would be capable of making long ocean voyages without having to hug (keep close to) the shore. The caravel carried more sail and was longer and slimmer than any ship then made, yet was tough enough to withstand gales at sea. He also developed the carrack, which was a slower ship, but one that was capable of carrying more cargo. To Prince Henry the world owes credit far development of craft that made oceanic exploration possible. He lives in history as Henry the Navigator. 1.Prince Henry's principal achievement was that of ______ A、making oceanic exploration possible B、improving the compass C、founding a school for mariners D、inventing the clipper ship 2.Prince Henry''s goal was to design vessels that could ______. A、make long deep-sea voyages B、travel faster than those in use at that time C、explore the coastline of. Portugal D、carry larger crews and more cargo than existing ones 3.Prince Henry started his school for the purpose of ______. A、helping mariners B、improving ship design and sailing methods C、studying astronomy and mathematics D、improving his own skill as a sailor

A.brushes on a commutator B.brushes on slip rings C.slip rings on a commutator D.direct connections from the stator

A．stage B．environment C．compound D．period

听力原文： Recently a five-year study was conducted by the Center for Childhood Development in Los Angeles, California regarding the way babies react to different types of people. The findings of the study suggest that infant children seem to be more comfortable around other babies than they are with strange adults. The result confirm the ideas of Dr. Richard Perelman, a well-know pediatrician, who has written many books about raising children. Dr. Richard Perelman supports the findings of the study and adds that it is a sounder idea to keep children with other children, as in a day care center, than it is to have children cared for by a baby-sitter. According to the results of the study, infants benefit from being in the company of other babies on a daily basis. Whereas some babies seem to show fear of strange adults. They are likely to reach out to try to touch an unfamiliar baby. The study even suggests that children as young as one year old can form. friendships According to the study, what is the way the babies react to different people？ A．They seem to be more comfortable around other babies than with strange adults. B．They seem to be more nervous around other babies than with strange adults. C．They seem to be as comfortable around other babies as with strange adults. D．They have no special interest.