[判断题]发现生产条件不正常或存在事故隐患时，班组长有权停止生产并采取-我要搜题网

[单项选择]牙合支托长度应为磨牙牙合面近远中径的（）
A. 1/2
B. 1／3
C. 1／4
D. 2/3
E. 3/4

[单选题]依据 GB/T18664-2002 《呼吸防护用品的选择、使用与维护》，( )使用后，应立即更换用完的或部分使用的气瓶或呼吸气体发生器。
A.携气式防护用品
B.过滤式防护用品
C.携带式防护用品
D.移动式防护用品

[多选题]根据实名制有关办法，（）时必须示有效身份证件原件。
A.购票
B.改签
C.退票
D.乘车

[不定项选择题]共用题干 Less Is More
It sounds all wrong-drilling holes in a piece of wood to make it more resistant to knocks.But it works because the energy from the blow gets distributed throughout the wood rather than focusing on one weak spot.The discovery should lead to more effective and lighter packaging materials.Carpenters have known______(51) centuries that some woods are tougher than others.Hickory（山核桃木）,for example, was turned into axe handles and cartwheel spokes（轮辐）because it can absorb shocks without breaking.
White oak,for example,is much more easily damaged,______(52)it is almost as dense.Julian Vincent at Bathe University and his team were convinced that the wood's internal structure could explain the differences. Many trees have tubular（管状的）vessels that run _______(53) the trunk and carry water to the leaves.In oak they are large,and arranged in narrow bands,but in hickory they are smaller,and more
evenly distributed.The researchers_______(54)this layout might distribute a blow's energy throughout the wood,soaking up a bigger hit.To test the idea,they drilled holes 0.65 millimetres across into a block of spruce（云杉）,a wood with ________( 55 ) vessels , and found that______( 56 ) withstood a harder knock.______(57)when there were more than about 30 holes per square centimetre did the wood's performance drop off. A uniform substance doesn't cope well with knocks because only a small proportion of the material is actually______(58).All the energy from the blow goes towards breaking the material in one or two places , but often the pieces left ______（59 ) are pristine（未经破坏的）.
But instead of the energy being concentrated in one place,the holes provide many weak spots that all absorb energy as they break,says Vincent."You are controlling the places_______(60)the wood breaks,and it can then absorb more______(61),more safely."The researchers believe the principle could be applied to any material________(62)example,to manufacture lighter and more protective packaging.It could_______(63)be used in car bumpers,crash barriers and armour for military vehicles,says Ulrike Wegst,a_______(64)at the Max Plank Institute for Mental Research in Stuttgart.
But she emphasizes that you______(65)to design the substance with the direction of force in mind. "The direction of loading is crucial,"she says. 55._________
A.no
B.per
C.each
D.every

[判断题]发现生产条件不正常或存在事故隐患时，班组长有权停止生产并采取必要的补救措施。在安全生产条件不具备时，有权建议上级采取措施，否则，有权拒绝生产。A.正确B.错误

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[判断题]发现生产条件不正常或存在事故隐患时，班组长有权停止生产并采取必要的补救措施。在安全生产条件不具备时，有权建议上级采取措施，否则，有权拒绝生产。
A.正确
B.错误