更多"[不定项选择题]共用题干
B家具木材厂加工车间内用可移动式传送带传送"的相关试题:
[不定项选择题]共用题干
B家具木材厂加工车间内用可移动式传送带传送物料，可移动式传送带的驱动电机使用380V三芯电缆线供电，其铁制控制箱入口处的电缆线用布条缠绕固定。因控制箱随传送带经常移动，操作人员为图方便，只安装了一个螺栓固定。控制箱没有漏电保护装置。木材厂加工车间内粉尘浓度常年超标。2009年5月21日15时20分，由于车间内木材堆积，影响传送带正常工作，现场操作人员未采取任何保护措施带电移动传送带。在移动过程中，三芯电缆线松动脱落，带电电缆接触控制箱外壳，导致1名员工触电。现场员工情急之下未切断电源就拉扯三芯电缆线，引发电缆短路打火，发生粉尘爆炸事故。事故造成2人当场死亡、1人重伤。重伤者经34天抢救无效死亡。事故造成木材加工车间厂房部分坍塌，全厂停产，直接经济损失800余万元。
根据以上场景，回答下列问题（共16分，每题2分，1～3题为单选题，4～8题为多选题）：
针对B厂的粉尘爆炸危险性，下列说法正确的有()
A.粉尘的分散度越高，越容易发生爆炸
B.粉尘浓度越高，爆炸危险性越大
C.含氧量越高，爆炸强度越大
D.环境温度越高，爆炸危险性越大
E.粉尘湿度越高，爆炸危险性越大
[不定项选择题]B家具木材厂加工车间内用可移动式传送带传送物料。可移动式传送带的驱动电机使用380V三芯电缆线供电，其铁制控制箱入口处的电缆线用布条缠绕固定。因控制箱随传送带经常移动，操作人员为图方便，只安装了一个螺栓固定。控制箱没有漏电保护装置。
木材加工车间内粉尘浓度常年超标。2009年5月21日15时20分，由于车间内木材堆积，影响传送带正常工作，现场操作人员未采取任何保护措施带电移动传送带。在移动过程中，三芯电缆线松动脱落，带电电缆接触控制葙外壳，导致1名员工触电。现场员工情急之下未切断电源就拉扯三芯电缆线，引发电缆短路打火，发生粉尘爆炸事故。
事故造成2人当场死亡、1人重伤。重伤者经34天抢救无效死亡。事故造成木材厂加工车间厂房部分坍塌，全厂停产，直接经济损失800余万元。
根据以上场景。回答下列问题：
针对B厂的粉尘爆炸危险性，下列说法正确的是( )。
A.粉尘的分散度越高，越容易发生爆炸
B.粉尘粒度越细，爆炸危险性越大
C.含氧量越高，爆炸强度越大
D.粉尘温度越高，爆炸危险性越大
E.粉尘湿度越高，爆炸危险性越大
[不定项选择题]共用题干
Animal's “Sixth Sense”
A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in December, 2004.It killed tens of thousands of people in Asia and East Africa. Wild animals,1， seem to have escaped that terrible tsunami. This phenomenon adds weight to notions that they possess a“sixth sense” for2 ,experts said.
Sri Lankan wildlife officials have said the giant waves that killed over 24,000 people along the Indian Ocean island's coast clearly 3 wild beasts,with no dead animals found.
“No elephants are dead,not4a dead rabbit. I think animals can5 disaster.
They have a sixth sense. They know when things are happening,”
H.
D. Ratnayake,deputy director of Sri Lanka's Wildlife Department,said about one month after the tsunami attack. The6washed floodwaters up to 2 miles inland at Yala National Park in the ravaged（被 毁坏的）southeast, Sri Lanka's biggest wildlife7and home to hundreds of wild elephants and several leopards（豹）.
“There has been a lot of8 evidence about dogs barking or birds migrating before volcanic eruptions（火山爆发）or earthquakes. But it has not been proven ,” said Matthew van Lierop,an animal behavior 9 at Johannesburg Zoo.
“There have been no10studies because you can't really test it in a lab or field setting , ” he told Reuters. Other authorities concurred（同意）with this11.
“Wildlife seem to be able to pick up certain12 ,especially birds…there are many re- ports of birds detecting impending（迫近的）disasters , ” said Clive Walker , who has written several books on African wildlife.
Animals13 rely on the known senses such as smell or hearing to avoid danger such as predators（食肉动物）.
The notion of an animal “sixth sense”一or14other mythical power一is an enduring one which the evidence on Sri Lanka's ravaged coast is likely to add15.
13._________
A.unwillingly
B.occasionally
C.doubtfully
D.certainly
