Practice 5The Grand Canyon A famous American John Muir said in 1898: “The Grand Canyon…as unearthly in the color and grandeur and quantity of its architecture as if you had found it after death on some other star.” Like Muir, those of us who stand along the rim are prompted to wonder about the unearthliness and the forces that created and are still changing this place. After more than 100 years of studies, many things are still obscure. Today visitors come by the thousands—the great and simple of the earth — all in a spirit of marvel. Travelers come from every state of the Union, from every country in Europe and Asia, pilgrims to a shrine that is the same as the creed. From the depths of the canyon comes welling silence. Seldom can you hear the roar of the river. For all sounds are swallowed in this gulf of space. ‘It makes one want to murmur. A woman once whispered to her companion. This silence is not the silence of death；rather, it is a presence. It is like a great piece of music. But music made of man works up to a climax and ceases；the Grand Canyon is all climax, a chord echoing into eternity. Perhaps the most spectacular feature of the Grand Canyon, its Redwall limestone cliff, stands about half way up the chasm and is practically vertical. Its average height is550 feet almost exactly that of the Washington Monument. Though it is actually gray-blue limestone, the surface of the cliff has been stained to a sunset hue by iron salts washing out of the rocks. Above the Redwall come alternating layers of red sandstone and shale(页岩)1, 000 feet thick, then comes the next pale-blue layer. The topmost layers are a yellowish limestone. Now, visitors to the South Rim alone may number 18, 000 in a single day. Some of that number will travel by mule(轻型牵引机)train down Bright Angel Trail to the canyon’s floor, cross the raging fiver by a suspension bridge and amount to the North Rim. Though the two rims face each other across only 12 miles, it is a journey of 214 miles by car from one to the other. Nor can you visit the North Rim except in summer；some 1, 200 feet higher than the South Rim, it is snow covered much of the year except in July and August. But there is no day that you may not visit the South Rim and find the sun warm on your face and the air perfumed with the incense of smoke from an Indian hearth. The Grand Canyon is an unearthly sight. No wonder an American writer and journalist said, “I came here an atheist, and departed a devout believer.”
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C企业为汽车密封条生产企业，主要原料为橡胶，为扩大生产，在Q市某工业区租赁三层办公楼主体，厂房2栋，2015年10月投产。1#厂房为单层节能钢结构厂房，位于三层办公楼东侧，建筑面积5000m2，厂房内有5条生产线，主要工艺为：胶粒挤出→微波硫化加热→喷涂→植绒（采用聚酯绒毛）→打磨→喷码→粗切割。主要设备有：挤出机、微波硫化箱、喷涂机械、植绒机、打磨机、牵引机、喷码机、切割机、空压机等，厂房西北角设有空压机房。2#厂房也是单层新型钢结构厂房，位于1#厂房的北侧，建筑面积5000m2，厂房内为3个作业区，其中I区为人工油漆喷涂区，安装有通风系统，并采用活性炭对气体净化。II区为注塑成型区，安装有25台高温对撞压机。III区为冲切区，安装有40台气动冲切机。2#厂房北侧设有危险化学品库和2个气瓶库，危险化学品库内有油漆、胶、醋酸乙酯、二甲苯、酒精、正庚烷等。2个气瓶库分别存放氧气、氩气、乙炔等气瓶。2017年1月10日，C企业发生苯中毒事故，导致一人受伤。2017年3月16日，Q市安全生产监管部门在对C企业进行安全生产和职业卫生检查时，发现C企业未进行职业病危害评价，职业病危害因素检测记录不全，植绒室内未使用防爆电器等问题。针对以上问题，Q市安全生产监督管理部门对C企业下发整改通知书，要求该企业限期整改。根据场景，回答下列问题问题：C企业与员工签订劳动合同时，应在合同中写明的职业卫生内容包括（）。
A、职业病危害及其后果
B、职业病防护措施
C、职业病危害事故应急预案
D、职业病防治资金投入
E、职业病待遇
C企业为汽车密封条生产企业，主要原料为橡胶，为扩大生产，在Q市工业区租赁三层办公楼主体，厂房2栋，2015年10月投产。1#厂房为单层节能钢结构厂房，位于三层办公楼东侧，建筑面积5000m2，厂房内有5条生产线，主要工艺为：胶粒挤出→微波硫化加热→喷涂→植绒（采用聚酯绒毛）→打磨→喷码→粗切割。主要设备有：挤出机、微波硫化箱、喷涂机械、植绒机、打磨机、牵引机、喷码机、切割机、空压机等，厂房西北角设有空压机房。2#厂房也是单层新型钢结构厂房，位于1#厂房的北侧，建筑面积5000m2，厂房内为3个作业区，其中I区为人工油漆喷涂区，安装有通风系统，并采用活性炭对气体净化。II区为注塑成型区，安装有25台高温对撞压机。III区为冲切区，安装有40台气动冲切机。2#厂房北侧设有危险化学品库和2个气瓶库，危险化学品库内有油漆、胶、醋酸乙酯、二甲苯、酒精、正庚烷等。2个气瓶库分别存放氧气、氩气、乙炔等气瓶。2017年1月10日，C企业发生苯中毒事故，导致一人受伤。2017年3月16日，Q市安全生产监管部门在对C企业进行安全生产和职业卫生检查时，发现C企业未进行职业病危害评价，职业病危害因素检测记录不全，植绒室内未使用防爆电器等问题。针对以上问题，Q市安全生产监督管理部门对C企业下发整改通知书，要求该企业限期整改。根据场景，回答下列问题问题：C企业2#厂房内存在的职业病危害因素包括（）。
A、高温
B、苯系物
C、噪声
D、微波辐射
E、矽尘
Practice 5The Grand Canyon A famous American John Muir said in 1898: “The Grand Canyon…as unearthly in the color and grandeur and quantity of its architecture as if you had found it after death on some other star.” Like Muir, those of us who stand along the rim are prompted to wonder about the unearthliness and the forces that created and are still changing this place. After more than 100 years of studies, many things are still obscure. Today visitors come by the thousands—the great and simple of the earth — all in a spirit of marvel. Travelers come from every state of the Union, from every country in Europe and Asia, pilgrims to a shrine that is the same as the creed. From the depths of the canyon comes welling silence. Seldom can you hear the roar of the river. For all sounds are swallowed in this gulf of space. ‘It makes one want to murmur. A woman once whispered to her companion. This silence is not the silence of death；rather, it is a presence. It is like a great piece of music. But music made of man works up to a climax and ceases；the Grand Canyon is all climax, a chord echoing into eternity. Perhaps the most spectacular feature of the Grand Canyon, its Redwall limestone cliff, stands about half way up the chasm and is practically vertical. Its average height is550 feet almost exactly that of the Washington Monument. Though it is actually gray-blue limestone, the surface of the cliff has been stained to a sunset hue by iron salts washing out of the rocks. Above the Redwall come alternating layers of red sandstone and shale(页岩)1, 000 feet thick, then comes the next pale-blue layer. The topmost layers are a yellowish limestone. Now, visitors to the South Rim alone may number 18, 000 in a single day. Some of that number will travel by mule(轻型牵引机)train down Bright Angel Trail to the canyon’s floor, cross the raging fiver by a suspension bridge and amount to the North Rim. Though the two rims face each other across only 12 miles, it is a journey of 214 miles by car from one to the other. Nor can you visit the North Rim except in summer；some 1, 200 feet higher than the South Rim, it is snow covered much of the year except in July and August. But there is no day that you may not visit the South Rim and find the sun warm on your face and the air perfumed with the incense of smoke from an Indian hearth. The Grand Canyon is an unearthly sight. No wonder an American writer and journalist said, “I came here an atheist, and departed a devout believer.”