（）在离心式水泵的设计中是主要参数。 A.流量 B.扬程 C.效率 D.比转速

电视连续剧《我的青春谁做主》在中央电视台一套热播后，引起广大父母和孩子们的思考。作为青春年少的我们，要对自己的青春负责。下列属于对自己青春负责的是

A．对待学习，发愤图强

B．犯下过错，积极推脱

C．与人相约，不守承诺

D．对待生活，讲求享乐

起调节复合树脂物理机械性能作用的是（）

A.偶联剂

B.化学固化引发剂

C.光敏剂

D.无机填料

E.着色剂

The economy of the United states after 1952 was the econnomy of a well-fed,almost fully employed people. Despit occasional alarms, the country escaped any postwar depression and lived in a state of boom. A n economic survey of the year 1955, a typical year of the 1950’s, may be typical as illustrating the rapid economic growth of the decade. The national output was value at 10 percent above that of 1954 (1955 output was estimated at 392 billion dollars). The production of manufacturers was about 40 percent more than it had averaged in the years immediately following World War 2. The country’s business spent about 30billion dollars for new factories and machinery. National income available for spending was almost a third greater than it had been it had been in 1950. Consumers spent about 256 billion dollars; that is about 700 million dollars a day ,or about twenty-five million dollars every hour , all round the clock. Sixty-five million people held jobs and only a little more than two million wanted jobs but could not find them . Only agriculture complained that it was not sharing in the room. To some observers this was an ominous echo of the mid-1920’s . As farmer’s shre of their products declined , marketing costs rose. But there were , among the observers of the national economy, a few who were not as confident as the majority . Those few seemed to fear that the boom could not last and would eventually lead to the oppsite-depression.

What is the best title of the passage?（）

A.The Agriculatural Trends of 1950’s

B.The Unemployment Rate of 1950’s

C.U.S. Economy in the 50’s

D.The Federal Budget of 1952

运营时间内，列车驾驶模式原则上由司机掌握，采用RM（限制人工驾驶）、URM/NRM（非限制人工驾驶）模式驾驶时应经行调同意。

“运输工具”栏应填（）。

A．Da Qing He 0133w/98/08/18

B．Da Qing He 0133w/98/08/12

C．Da Qing He/0133w

D．Da Qing He