建设工程从表面上检查，就很难发现内在的质量问题，这体现了工程质量的( )。A．质量

实验误差是做实验时经常面对的问题，如何减少实验误差是做实验时必须解决的问题，请分析并回答有关问题：

(1)在做蛋白质鉴定实验时，向试管中加入2mL双缩脲试剂A液后，又加2mL双缩脲试剂B液，振荡摇匀，溶液呈蓝色，最可能的原因是__________。

(2)若利用小麦根尖的成熟区细胞进行质壁分离实验，由于观察的细胞无色透明，为了取得更好的观察效果，调节显微镜的措施是____________。

(3)在叶绿体色素的提取和分离实验中，取材合适且提取色素的过程很规范，但得到的滤纸条上的色素带颜色均非常淡，可能的原因有①滤纸条湿度大，没有预先干燥处理；②__________。

(4)做根尖有丝分裂实验，视野中细胞为长方形，并找不到处于分裂期细胞的原因是_______。

(5)在探究培养液中酵母菌种群数量的动态变化的实验中，两位同学从同一支试管中吸取酵母菌培养液，通过血球计数板进行计数，记录的数据差别较大，很可能的原因是___________。

患者女，36岁。经血淋漓不尽30天，血色淡，质稀薄，伴面色萎黄，神疲肢倦，气短懒言，纳呆便溏，舌淡而胖，苔白，脉细无力。治疗除主穴气海、足三里、三阴交外，还应加取（）。

A.百会、脾俞

B.命门、腰阳关

C.肾俞、命门

D.然谷、太溪

E.隐白、血海

下图是水的微观层次结构，图中右侧“○”表示

A．氢元素

B．氢原子

C．氧元素

D．氧原子

Fear can be a wonderful feeling in our lives, protecting us from dangerous situations and keeping us safe. But fear can also limit our lives significantly. While it may not be conscious, fear may make us think we are unacceptable or that what we have to offer isn’t valuable. Fear may make us feel that we are not safe being ourselves.

To avoid feeling fear, we may limit our lives greatly, living in tiny boxes. Living this way gives us the illusion(假象) of safety but leaves us with an unfulfilling life of no passion. If we shine a light on many of our fears, we see they have a very limited view of what is “safe” and how to “protect” us. Many of our fears are concerned only with protecting us from humiliation(羞辱) and failure. While these fears are doing their jobs incredibly well, they are doing so with faulty and outdated programming. Many fears we have as adults are trying to protect us as they protected us when we were children. Indeed, many of our current, automatic reactions to fear were actually formed when we were children.

Even so, it’s important not to judge ourselves for feeling these types of fears. If we judge ourselves, we will bury our fears or disguise them. By denying our fears, however, we also deny our energy, creativity and passion.

So what do we do with fear? We recognize the fear for what it is--- a feeling we’ve experienced many times in the past and a feeling we will experience many times in the future. We become very familiar with our own particular brand of fears and how we allow them to control our lives. It is especially beneficial for each of us to become aware of the particular behavior patterns we’ve adopted when we feel fear, so we can look at our reactions with a sense of humor and compassion. Then, if we wish, we can choose a different response, which can be a scary yet very exciting experience.

71. According to the first paragraph, fear sometimes      .

A. protects us when we’ve made mistakes      B. makes sure our feelings are not hurt

C. brings great change to our everyday life     D. makes us lose confidence in ourselves

72. It can be inferred from the passage that the author     .

A. thinks it difficult to control our fear       B. believes fears protect us negatively

C. thinks it’s good to criticize ourselves      D. values the advantages of feeling fear

73. According to the author, the ways we react to fear       .

A. vary from person to person      B. have been formed since childhood

C. develop during our growth       D. will not change until we get old

74.The last paragraph mainly tells us        .

A. what is the essence of fears       B. usual reactions we have when feeling fear

C. how to deal with fears reasonably  D. the importance of humor and compassion

75.What would be the best title for the passage?

A. Is fear managing your life?   B. Be calm when feeling fear

C. What do you fear most?      D. Passion, chance and fear

CO2气体保护焊焊接不锈钢时，焊接接头具有较高的抗晶腐蚀性能。（）