已知limΔx→0f（x0+2Δx）-f（x0）3Δx=1，则导数f′（x0）等于（

下图是“某年部分国家占世界铝土矿及铝产量的比重图”，完成24～25题。

小题1:从工业区位因素来讲，炼铝业属于

A．动力指向型

B．市场指向型

C．原料指向型

D．技术指向型小题2:盛产铝土矿但炼铝业欠发达的国家是

A．澳大利亚和巴西

B．牙买加和几内亚

C．美国和加拿大

D．印度和中国

女性，32岁，尿频、尿痛、尿急，下腹部不适2d就诊，无发热，无肾区叩击痛，尿镜检：白细胞满视野、红细胞2～4个/HP，肾功能正常。

若停服抗菌药物7d后复诊已没有尿频、尿急、尿痛等不适，清洁中段尿培养为阳性，细菌数10/ml，且为同一细菌，此时患者应诊断为（）

A.急性肾盂肾炎

B.隐匿性肾盂肾炎

C.急性膀胱炎

D.无症状尿检异常

E. * * 综合征

在下列各项中，属于全面预算体系构成内容的有（）。

A、业务预算

B、财务预算

C、专门决策预算

D、零基预算

E、滚动预算

The United States has historically had higher rates of marriage than those of other industrialized countries. The current annual marriage (51) in the United States—about 9 new marriages for every 1,000 people—is (52) higher than it is in other industrialized countries. However, marriage is (53) as widespread as it was several decades ago. (54) of American adults who are married (55) from 72 percent in 1970 to 60 percent in 2002. This does not mean that large numbers of people will remain unmarried (56) their lives. Throughout the 20th century, about 90 percent of Americans married at some (57) in their lives. Experts (58) that about the same proportion of today’s young adults will eventually marry.

The timing of marriage has varied (59) over the past century. In 1995 the average age of women in the United States at the time of their first marriage was 25. The average age of men was about 27. Men and women in the United States marry for the first time at an average of five years later than people did in the 1950s. (60) , young adults of the 1950s married younger than did any previous generation in U. S. history.

58().

A.project 

B.plan 

C.promise 

D.propose

下列哪项不是早期妊娠的表现

A．黑加征
B．自觉胎动
C．尿频
D．停经
E． * * 蒙氏结节