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【单选题】
关于磁感应强度和磁感线,下列说法中错误的是( )
A.
磁感线上某点的切线方向就是该点的磁感线强度的方向
B.
磁感线的疏密表示磁感应强 度的大小
C.
匀强磁场的磁感线间隔相等、互相平行
D.
磁感就强度是只有大小、没有方向的标量
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A.
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B.
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C.
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D.
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A.
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C.
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D.
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E.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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E.
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A.
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B.
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C.
CCK主要作用于胰腺泡细胞,促进酶的分泌
D.
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【多选题】食品污染的防范措施有( )。
A.
持车间的良好通风和适宜温度,顶棚呈圆弧形,尽量缩小温差,有效控制水滴和冷凝水的形成
B.
对灯具加装防护罩,将易脱落碎片的器具更换为耐腐蚀、易清洗的不锈钢器具
C.
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D.
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E.
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【简答题】某开发商拟建一城市综合体项目,预计总投资十五亿元。发包方式采用施工总承包,施工单位承担部分垫资,按月度实际完成工作量的75%支付工程款,工程质量为合格,保修金为3%,合同总工期为32个月。 某总包单位对该开发商社会信誉,偿债备付率、利息备付率等偿债能力及其他情况进行了尽职调查。中标后,双方依据《建设工程工程量清单计价规范》GB50500-2013,对工程量清单编制方法等强制性规定进行了确认,对工...
相关题目:
【单选题】第19篇 下面文章中有5处需要添加小标题。请从以下选项中选出符合各段意思的小标题。
A.
What will you do if your hair or clothes start to burn?
B.
Don’t open a hot door!
C.
Make escape plans.
D.
Practice for a fire.
E.
Put a smoke alarm in the house People know the ers of fires. It’s good for a family to learn how toprepare for a fire. Here are some suggestions: 1 . Smoke from a fire causes the alarm (报警) to go off .Thealarm makes a loud sound. The sound tells everyone to leave the house at once. 2 . They should know all the ways out of the house. Ifthere is a fire, everyone follows the plan to get out. Part of the plan is tocheck all the windows to make sure they can be opened easily (容易地). Buy fire extinguishers ( 灭火器) in the house, Everyone in the family should knowhow to use them. 3 . They do fire practice because they teach childrenabout fire safety. Everyone in the family should know the following fire rules: 4 . The fire can grow more quickly if youopen the door. Stay close to the floor! Smoke can be more erous than fire,The best air is near the floor because smoke rises( 上升). 5 . First, stop! Don’t run! The fire burns faster becauseof more air. Drop! Fall to the floor. Then roll (滚动)! Turning over and over will makethe fire go out. Put a blanket (毯子) around you to keepair away from the fire that may still be on you. A clever family is ready all the time. If there is a fire, don’t forgetto call 119 for help.