测定变压器油的闪点，当时的大气压为104.1kPa，试验结束时，温度计的读数为155

牙列中彩度最高的牙是 （）

A.中切牙

B.侧切牙

C.尖牙

D.前磨牙

E.磨牙

实验室需配制100g15%的NaOH溶液．在配制溶液过程中，下列做法正确的是（　　）

A．在托盘上垫纸称量15gNaOH固体

B．用药匙搅拌，以加速NaOH固体的溶解

C．用100mL量筒量取85mL水

D．称量时指针向右偏转，调节游码使天平平衡

对于SLE下述哪项正确（）

A.表现为肾病综合征者多为选择性蛋白尿

B.90％～100％病人光镜、电镜和免疫荧光检查肾有病变

C.1／3病人肾受损

D.90％病人死于慢性肾衰竭

E.很少引起急性肾衰竭

背景材料：爱因斯坦在幼年时曾惊讶罗盘的指针永远指向北方，并由此产生了对科学研究的好奇心。后来，他说道：“我没有特别的天赋，我只有强烈的好奇心。”

辨题：有强烈好奇心的人，必定能有所发明创造。

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In 1965, the United States made important changes in its immigration laws, allowing many more immigrants to come and entirely eliminating the older laws’ bias (偏见, 偏向) in favor of white European immigrants. As a result, the United States is now confronted with a new challenge—taking in large numbers of new immigrants who are nonwhite and non-European. About 90 percent are from Asia, Latin America, and the Caribbean. In addition to the large numbers of legal immigrants, for the first time the United States has significant numbers of illegal immigrants. Many worry about what the impact will be on the American society. Can the American economy expand enough to offer these new immigrants the same opportunities that others have had What will be the effect on the traditional value system that has defined the United States for over 200 years

Many Americans see wonderful benefits for their country. Ben Wattenberg, a respected expert on American culture, believes that the "new immigration" will be of great help to the nation. According to Wattenberg, something very important is happening to the United States: It is becoming the first universal nation in history. Wattenberg believes that the United States will be the first nation where large numbers of people from every region on earth live in freedom under one government. This diversity, he says, will give the nation great influence and appeal to the rest of the world during the 21^st century.

Perhaps the United States will be described not as a "melting pot" or a "salad bowl" but as a "mosaic"—a picture made up of many tiny pieces of different colors. If one looks closely at the nation, the individuals of different colors and ethnic groups are still distinct and recognizable, but together they create a picture that is uniquely American. "E Pluribus Unum" —the motto of the United States from its beginning—means one composed of many. "Out of many, one. \

Ben Wattenberg believes that().

A. the new immigration will contribute greatly to improving America’s image in the world

B. the new immigration will help America to become the largest nation in the world

C. the new immigrants will find their own values in conflict with the American values

D. the new immigration will make the American government accepted by the rest of the world