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当前学科：安全生产知识竞赛
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《标准化手册》要求基坑上下通道的固定式爬梯应用金属材料制成，梯道临边侧设防护栏杆，梯道宽度不小于（）mm，坡度不宜小于50°。
A
300
B
400
C
600
D
700
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下列项目中，不属于收入范围的是（）。
（）主要是对有相关关系的各类税收数据进行的对比分析，其目的是通过对比发现企业财务核算、纳税申报中的异常情况以及税款征收中的问题。
下列（）化合物对稻纵卷叶螟的活性最高
在常温下酚（）于水。
符合下列条件之一的国内信用证卖方押汇业务，可作为低信用风险业务办理（）。
二叉树是度为2的有序树。()
Good Table Manners Manners play an important part in making a favorable impression at the dinner table. Here are some general rules： Napkin （餐巾） use The meal begins when the host unfolds his or her napkin. This is your signal to do the same， so place your napkin on your lap. Unfold it completely if it is a small napkin. Or in half， lengthwise （纵向地） ，if it is a large dinner napkin. If you need to leave the table during the meal， place your napkin on your chair as a signal to your server that you will be returning. Once the meal is over， place your napkin neatly on the table to the right of your dinner plate. Do not refold it. Use a napkin only for your mouth. Never use it for your nose， face or forehead. Use of utensils （餐具） Start with the knife， fork or spoon furthest from your plate， and work your way in， using one utensil for each course. If soup is served， remember to spoon away from yourself. This helps stop the drips. Do not put the entire soup spoon in your mouth. Instead， fill a soup spoon about 75 per cent with soup， and sip（啜饮）it from the side noiselessly. After finishing dinner， place the knife and fork parallel to one another across the plate with the knife blade facing inward toward the plate. Using your fingers Here's a list of finger foods： sandwiches， cookies， small fruits or berries with stems， French fries and potato chips， and hamburgers. Chew（咀嚼）with your mouth closed and don't make noise； don't talk with your mouth full. Bread must be broken with your hands. It is never cut with a knife. Don't pick something Out of your teeth. Instead， excuse yourself to the bathroom. If possible， try not to cough at the table. Do not put your elbows （肘） on the table. In France， it is essential to have both hands above the table at the same time. Do not put bones or anything else on the table. Things that are not eaten should be put on your plate. Where is the napkin normally placed during the meal？（） The napkin is used only for（）. Which utensil is used first？（） All of the following are finger foods EXCEPT（）. Which of the following shows good table manners？（）
认为人有各种各样的潜能，并且有利用这些潜能来实现自我的倾向属于（）理论的观点
五四前，“国语”改为“语文”。()
男，65岁。初戴全口义齿时，发现补偿曲线曲度过小，该患者戴义齿后最容易出现的问题是（）