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【简答题】
(C) A man was traveling abroad in a small red car.One day he left the car and went shopping.When he came back, its roof was badly damaged. Some boys told him that an elephant had damaged it. The man did not believe them,but they took him to a circus which was near there. The owner of the elephant said,"I am very sorry!My elephant has a big, round,red chair.He thought that your car was his chair, and he sat on it!" Then he gave the man a letter, in which he said that he was sorry and that he would pay for all the damage. When the man got back to his own country,the customs officers would not believe his story.They said,"You sold your new car while you were abroad and bought this old one!" It was only when the man showed them the letter from the circus man that believed him.
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【单选题】关于自定义菜单,下面说法正确的是
A.
最多创建5个一级菜单
B.
每个一级菜单下最多可创建2个子菜单
C.
一级菜单名称名字不多于4个汉字或8个字母
D.
关于“跳转到网页”功能,目前部分公众号不支持跳转到外部链接。
【简答题】(5分)在一定温度下的密闭容器中存在如下反应:2SO 2 (g)+ O 2 (g) 2SO 3 (g),已知c 始 (SO 2 )=0.4mol/L,c 始 (O 2 )=1mol/L,经测定该反应在该温度下的平衡常数K=19。判断:当SO 2 转化率为50%时,该反应是否达到平衡状态,若未达到,向哪个方向进行?(要求写出计算过程)
【单选题】The author implies in the tenth paragraph that
A.
Americans can't wag their fingers because carnivorous diet is unhealthy for the bones.
B.
Americans don't have the right to criticize other nations' unhealthy eating habit.
C.
Americans should account for the largest portion of green house gas emission.
D.
Americans prefer to eat meat because they believe that meat has more nutrition.
【单选题】一定温度时,向容积为2L的密闭容器中充入一定量的SO 2 和O 2 ,发生反应2SO 2 (g)+O 2 (g) 2SO 3 (g) ?H=?196kJ·moL ? 1 ,一段时间后达平衡,反应过程中测定的部分数据见下表: 反应时间/min n(SO 2 )/mol n(O 2 )/mol 0 2 1 5 1.2 10 0.4 15 0.8 下列说法不正确的是
A.
反应在前5min的平均速率为v (SO 2 )=0.08mol·L ? 1 min ? 1
B.
保持温度不变,向平衡后的容器中再充入1molSO 2 和0.5molO 2 时,v (正)> v (逆)
C.
保持其他条件不变,若起始时向容器中充入2molSO 3 ,达平衡时吸收78.4kJ的热量
D.
相同温度下,起始时向容器中充入1.5mol SO 3 ,达平衡时SO 3 的转化率为40%
【简答题】Don't ______________ your fingers.
【多选题】关于电焊机接地装置的设置,说法正确的有( )。
A.
多台电焊机的外壳接应串联接地
B.
电焊机的电源开关应单独设置
C.
电焊机一次线的电源电缆长度不宜大于5m
D.
电焊机的二次线可用结构钢筋代替
【简答题】在一定温度下,向某固定容积的密闭容器中投入2moLSO 2 与1moL O 2 ,发生如下反应 2SO 2 +O 2 2SO 3 。平衡后,SO 2 的转化率为а1,SO 2 浓度为c1moL/L,SO 2 体积分数为a1%;若此时再加入2moLSO 2 与1moLO 2 ,达到新平衡后,SO 2 的转化率为а2,SO 2 浓度为c2moL/L,SO 2 体积分数为 a2%;则a1 ______a...
【简答题】在一定温度下,把2 mol SO 2 和1mol O 2 通入一个一定容积的密闭容器里,发生如下反应: 2SO 2 (g)+O 2 (g) 2SO 3 (g) 当此反应进行到一定程度时,反应混合物就处于平衡状态,现在该容器中维持温度不变,令a、b、c分别代表初始加入的SO 2 、O 2 、SO 3 的物质的量,如果a、b、c取不同的数值,它们必须满足一定的相互关系,才能保证平衡时反应混合物中3种气...
【单选题】下面关于IPv6地址的表示中,不正确的一项是( )。
A.
基本形式 2001:da8:101e:8000:0:1g:1:h1
B.
本地 链路单播地址 FE80::61ae:b9a3:744f:92e1
C.
零压缩表示 2001:da8:101e:1::1
D.
URL 中IPv6地址 http://[2002:3::cd:1a]:80/site/index.html
【单选题】All men have ten fingers. John is a man. Therefore, John has ten fingers.
A.
Valid and sound argument
B.
Valid and unsound argument
C.
Invalid
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