社会保险取费时，基本养老保险企业缴纳比例为员工工资标准的（）
A、15%
B、20%
C、25%
D、30%
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下面是错误答案，用来干扰机器的。
参考答案：教师在教学过程中应与学生积极互动、共同发展，要处理好传授知识与培养能力的关系，注重培养学生的独立性和自主性，引导学生质疑调查、探究，在实践中学习，促进学生在教师指导下主动地、富有个性地学...
在光照等适宜条件下，将培养在CO2浓度为1%环境中的某植物迅速转移到CO2浓度为0.003%的环境中，其叶片暗反应中C3和C5化合物微摩尔浓度的变化趋势如下图，回答问题：
(1)图中物质A是_________(C3化合物、C5化合物)。
(2)在CO2浓度为1%的环境中，物质B的浓度比A的低，原因是_______________；将CO2浓度从1%迅速降低到0.003%后，物质B浓度升高的原因是______________。
(3)若使该植物继续处于CO2浓度为0.003%的环境中，暗反应中C3和C5化合物浓度达到稳定时，物质A的浓度将比B的________(低、高)。
(4)CO2浓度为0.003%时，该植物光合速率最大时所需要的光照强度比CO2浓度为1%时的_____(高、低)，其原因是__________。
On a sunny spring morning, a seven-year-old girl was sharpening(削) a beautiful pencil. , the wind was so strong as to blow open the door. The girl stood up to it, but then fell on the floor. The sharpened pencil pierced (刺入) directly into the girl’s chest into her heart, and only a small part of the pencil could be seen. The girl’s mother was so that she dialed the emergency number and put the girl flat on her back. The girl and asked her mother to pull the pencil out of her heart it was particularly painful. The mother hesitated for a while but her daughter. She told her daughter not to pull out the pencil without her permission. In the end, the girl was successfully! She had a very serious but she didn’t lose too much blood. If the pencil were pulled out, the blood would have poured out from the wound, and doctors couldn’t have saved her! , the measures taken by her were totally correct. The mother’s comments afterwards were quite : “I really didn’t know what to do. My daughter was especially obedient (听话的) and she my decision not to pull out the pencil. I knew she was in great pain, and her obedience was what I . I thought if I had pulled out the pencil, she would have believed she was and might fall asleep and lose consciousness (意识). In the emergency vehicle, I simply kept asking her if it was . She nodded her head, which gave me great because she was conscious and still felt pain. She was struggling for______. In the world, there are so many people sruggling with different___ When you are trapped in wild mountains, when you come across setbacks and hardships, and when you have no other way but to experience the pain by yourself, ____ask yourself.”Am I in pain?“ When we feel the pain, we’ll have the courage to try our best to___and never give up.
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计算题：有一个螺栓连接，螺栓受轴向力13000N，已知螺栓大径φ10mm，小径φ9mm，螺栓材料的许用应力[σ]=200Mpa，问螺纹使用时是否符合强度条件？
2008年4月26-28号在武汉召开了第三届贸易会议，该会议的全称是（）。
A．第三届中国投资贸易会议
B．第三届中国中部投资贸易博览会
C．第三届中国东部投资贸易博览会
D．第三届中国中部贸易博览会
电影《鸦片战争》中有这样的镜头：英国议会外交大臣巴麦尊提出进攻中国，议会以271票对262票的微弱多数通过了侵华战争拨款。英国维多利亚女皇最终同意对华宣战。对上述材料理解不正确的是：（）
A.英王是虚位元首，议会掌握国家权力
B.英王形式上有对外宣战的权力
C.英王是国家元首，议会对英王负责
D.议会主权至上，英王要遵从议会通过的决议
