下列史实按时间先后顺序排列，正确的是 ①武昌起义爆发②兴中会成立③袁世凯窃取辛亥

阅读下面材料，回答问题。（4分）

据媒体报道，我国每天约有300人丧生于车祸；全国每年因道路交通事故死亡人数超过10万人，直接经济损失巨大。我国道路交通事故死亡人数和死亡率均居世界前列。

现在，要在某交通事故多发区竖一块警示牌，请从以下角度为这块警示牌拟一句话，要求语言简练，表达得体，表意清楚。

（1）从直言警示的角度： 　

（2）从委婉警示的角度： 　

（3）从幽默警示的角度：

前列腺癌患者已有盆腔淋巴结转移者可选择以下治疗方法，除了（）

A.口服雌激素

B.药物去势

C.皮下注射LHRH类似物

D.双侧睾丸切除术

E.根治性前列腺切除和盆腔淋巴结清扫术

机械设备在运行过程中,摩擦离合器发热,应检查()是否合适。

A.润滑油油位 

B.摩擦片间隙 

C.传动带张紧力 

D.零件松紧度

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. \

What kind of image does it suggest by using the word "mosaic" to describe the American culture().

A. Negative.

B. Positive.

C. Unclear.

D. Common.

下列哪项病变不是维生素B2缺乏的表现

A．唇炎
B．舌炎
C．阴囊炎
D．毛囊炎
E．脂溢性皮炎