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China won the wheelchair curling( 冰壶 ) gold medal for its first-ever Winter Paralympic( 残奥会 ) medal at the 2018 PyeongChang Games here on Saturday, March 17, 2018. The Chinese team made an extra end to beat world champion Norway 6-5 in the final for its first-ever medal, and even a gold, in the history of the Winter Paralympic Games. “We just cheered each other on all over the game and I tried to do my best. Maybe that’s the reason why we could get the gold medal,” said China’s skip( 队长 ), Wang Haitao. “China, my country, is very important to me, so hearing the national anthem( 国歌 ) was a very special moment. It’s the first medal for China in the Winter Paralympic Games, and I think it is pretty big.” Skipped by Wang, China opened its scoring with two points in the first end, together with third Chen Jianxin, second Liu Wei, lead Wang Meng. They were supported by alternate Zhang Qiang and coach Yue Qingshuang. Norway scored a single point in the second end, added two more in the third through a mistake from Wang who then leveled the scores in the fourth end with a hit for one point. The second half turned much more nervous, with Norway blanking( 使空白 ) the fifth and hitting for a single point in the sixth. In the seventh end, the Chinese team scored two points, taking a 5-4 lead into the eighth where Norway only added one to force an extra end, scoring 5-5. The Chinese team then showed their great form as Chen, the third player, made an exact draw around six guards to sit in the four-foot as shot stone, which Norway failed to clear with its last two attempts, awarding China’s first-ever gold medal in the Winter Paralympic Games.
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举一反三
【单选题】均相催化剂加速化学反应的原因是
A.
降低了正反应的活化能,升高了逆反应的活化能,使化学平衡向正反应方向移动,因而加速了化学反应
B.
催化剂参加了化学反应,改变了反应历程,降低了反应活化能,因而加速了化学反应
C.
改变了反应的自由焓变,即使 Δ G 变为负值, Δ G 越负,正反应越易进行,因而加速了化学反应
D.
使反应物分子之间的碰撞次数增加,从而提高了反应速率
【判断题】对于上取整FIF[#j],绝对值大于原数的绝对值。对于下取整FUP绝
A.
正确
B.
错误
【单选题】催化剂能增大化学反应速率的原因是 ( )
A.
能降低反应所需的能量
B.
增大分子运动的速率,增加分子碰撞的机会
C.
催化剂并没有参与反应,所以能改变化学反应速率
D.
以上说法都不对
【单选题】催化剂加速化学反应的原因是( )。
A.
降低了正反应的活化能,升高了逆反应的活化能,使化学平衡向正反应方向移动,因而加速了化学反应
B.
催化剂参加了化学反应,改变了反应历程,降低了反应活化能,因而加速了化学反应
C.
改变了反应的自由焓变,即使ΔG变为负值,ΔG越负,正反应越易进行,因而加速了化学反应
D.
使反应物分子之间的碰撞次数增加,从而提高了反应速率
【单选题】下列关于催化剂说法不正确的是(  )
A.
加入催化剂可以加快化学反应速率,原因是降低了反应的活化能
B.
催化剂不影响平衡移动,但可以缩短建立平衡的时间
C.
催化剂在反应前后质量和化学性质都没有改变
D.
催化剂在反应历程中不参与反应
【单选题】催化剂加快反应速度的原因是
A.
催化剂参与化学反应
B.
改变了化学反应的历程
C.
降低了活化能
D.
提高了活化分子百分数
【判断题】对于上取整FIF[#j],绝对值大于原数的相对值。对于下取整FUP绝对值小平原数的绝对值。( )
A.
正确
B.
错误
【判断题】对于上取整FIF[#j],绝对值大于原数的绝对值。对于下取整FUP绝对值小于原数的绝对值。
A.
正确
B.
错误
【多选题】催化剂能改变化学反应速率的本质原因是
A.
改变化学反应的历程
B.
增加了活化分子百分数
C.
增大了反应物浓度
D.
增大了生成物浓度
E.
降低了反应的活化能
【简答题】催化剂能加快化学反应速率的原因是什么?
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