低稠度的硅橡胶印模材适用于取（） A.一次印模 B.二次印模的初印模 C.二次印模的

（10分）A、B、C、D、E都是短周期元素，原子序数逐渐增大，A、B处于同一周期，C、D、E同处另一周期。C、B可按原子个数比2∶l和1∶1分别形成两种离子化合物甲和乙。A原子的最外层电子数比次外层电子层多3个。E是地壳中含量最高的金属元素。根据以上信息回答下列问题：

（1）D元素在周期表中的位置是      乙物质的电子式是__________

（2）A、B、C、D、E五种元素的原子半径由小到大的顺序是_________ （用元素符号填写）

（3）E的单质加入到C的最高价氧化物对应的水化物的溶液中，发生反应的离子方程式是              

（4）E的单质、石墨和二氧化钛（TiO₂）按比例混合，高温下反应得到的两种化合物均由两种元素组成，其中有一种产物是TiC（在火箭和导弹上有重要应用）其反应方程式为                              

在竖直向上运动的电梯内，有一个质量为m的物体，它对电梯地板压力为F，其v-t图象如图所示，则（　　）

A．在0-1s内，物体的平均速度为1.5m/s

B．在1-3s内，物体处于失重状态

C．在0-3s内，物体的位移为零

D．在0-3s内，合外力对物体做功为零

警察个体道德认识活动

城镇失业保险，个人需要缴纳的比例占其工资额的百分比为多少？（）

A.1%

B.2%

C.3%

D.不需要缴纳

Washington: The Bush administration has ________for the first time that it may be willing to ________a multinational force in Iraq to operate under the ________of the United Nations as long as ________by an American. The idea was described by Richard L. Armitage, the deputy secretary of state, as just "________" in discussions at the United Nations. It was first ________publicly last week by Kofi Annan, the United Nations’’ secretary general.Mr. Armitage’’s remarks, made ________to regional reporters and released by ________today, represent ________in course for the administration, which has until now insisted that all ________matters in Iraq remain under total American control. Allowing the United Nations ________would be intended to win the support of the Security Council for ________authorizing the ________ occupation of the country.In his remarks, Mr. Armitage ________to discuss the plans________, saying, "I don’’t think it helps to ________publicly right now." But he described the arrangement under consideration as "a multinational force________" in which "the American would be the U.N. commander."On Monday, Defense Secretary Donald H. Rumsfeld was asked whether he could ________American troops fighting_______. His answer: "I think that’’s not going to happen." But he went on to rule out only "________" meaning by the United Nations, whose troops wear blue helmets over a peacekeeping force in Iraq.