高速混床内部阴、阳树脂比例为（）。

阅读理解

       1932   Liu Changchun ( 1901-1983 ) joined the 10th Olympic Games in Los Angeles, US. He is

the first Chinese to attend Olympics. He took part in the l00m and 200m race.

       1952   The People's Republic (共和围) of China sent its first delegation to the 15th Olympics in

Helsinki. Finland. This delegation had 40 people. But they arrived too late and missed most of the events.

       1984  China's first Olympics after its return to the IOC. China sent a large delegation to the 23rd

Games in Los Angeles, US. Xu Haifeng won a gold medal in the 50m pistol(手枪) shooting. It was  

China's  first  Olympic gold medal.

       1996   China got 16 gold medals in the 26th Atlanta Olympics. It was the fourth on the gold medal

list. Wang Junxia won a gold medal in the 5,000m race, and broke the world record.

       2000  China got 28 gold medals in the 27th Olympics held in Sydney, Australia. This time, China was the third on the gold medal list. Fu Mingxia won a gold medal in the platform diving.

       2004  China got 32 gold medals at the 28th Olympics in Athens, Greece. It held the second place on

the gold medal list. Liu Xiang won a gold medal in the ll0m hurdle(跨栏) . He is the first Asian to win this event.  

1. Who is the first Chinese to attend Olympics?     

A. Liu Changchun    

B. Xu Haifeng

C. Liu Xiang          

D. Wang Junxia

2. Who is the first Chinese that won an Olympic gold medal ？ 

A. Liu Changchun    

B. Xu Haifeng

C. Liu Xiang          

D. F'u Mingxia

3. When was the 28th Olympics held7   

A. In 1984              

B. In 1996

C. In 2000              

D. In 2004

4. How many gold medals did China get in Sydney Olympics?

A. 16                    

B. 27

C. 28                      

D. 32

5. Where did Wang Junxia break the world record in the Olympics ?

A. Los Angles        

B. Atlanta

C. Sydney              

D. Athens

某体育场设有照明设施和管理用房，其场地灯光布置采用四塔照明方式，其中灯塔位置如如图所示，灯塔距场地中心点水平距离为103m，场地照明灯具采用金属卤化物灯，请回答下列问题：

假设场地面积为17360m2，要求场地水平面上的平均照度为16001x，场地照明灯具采用2000W金属卤化物灯，光源光通量为200000lm，镇流器功率为光源功率的10%，灯具效率为0.8，利用系数取0.8，灯具维护系数取0.7，计算场地照明总功率为下列哪项数值？（不考虑四塔的灯数量均等）（）

A.385kW

B.550kW

C.682kW

D.781kW

一辆汽车以10m/s的速度匀速行驶，要求它刹车时必须在5m内停下来，则汽车加速度的数值不得小于______m/s²．

按照《税收管理员制度》规定，税收管理员的工作职责主要体现在（）

A.开展纳税评估

B.作出行政处罚决定

C.提供税法咨询和办税辅导

D.解决涉税争议

物业服务公司与车主签订车辆停放管理合同和协议，签订协议后，如果车辆在物业服务区域内停车场内丢失，车内物品丢失造成的损失仍由（）负责。

A、物业服务公司

B、物业服务公司和车主

C、车主

D、停车场保安人员