患儿封某，女，13岁，右上牙自发性疼痛2天，夜间加剧，不能用患侧咀嚼；咬合痛明显，伴右面部肿胀。检查：右上5 无龋，叩痛(+ +)，松(-)，牙石(-)，龈颊沟处饱满。X线示右上5无龋，根管较宽大，根尖呈喇叭口状，根管粗大，根尖周骨质密度稍低。
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【题一】甲单位与乙单位于2013年3月5日就某消防工程签订施工总承包合同，甲作为该工程的施工总承包单位，该工程建筑面积为20000m2，合同约定本工程于2013年3月15日开工，开工初期，甲需采购5吨角钢制作支架，角钢的供应价格为4100元 吨，运费为70元 吨，运输损耗2%，采购保管费率为1%。 1．本工程属于( )类工程。A.一类B.二类C.三类D.四类工程开工时，甲单位为施工人员支付了意外伤害保险费，这笔费用属于建筑安装工程的( )。A.人工费B.措施费C.规费D.企业管理费本批角钢的预算价格为( )元／吨。A.4108.2B.4220.12C.4211D.4178.2乙单位需最迟在( )将工程预付款支付给甲单位。A.2013.3.5B.2013.3.8C.2013.3.15D.2013.3.20购买角钢过程中，材料费不包括( )。A.材料运费B.材料保管费C.材料使用费D.检验试验费请帮忙给出每个问题的正确答案和分析，谢谢！ 点击查看答案

The Clock That Wakes You When You Are ReadyAre you a real grump (脾气坏的人) in the mornings? Do you wake up every day feeling tired, angry and upset, and all too ready to hit the snooze (瞌睡) button? If so, then a new alarm clock could be just for you.The clock, called SleepSmart, measures your sleep cycle, and waits for you to be in your lightest phase of sleep before waking you up. Its makers say that should ensure you wake up feeling refreshed (恢复精力) every morning.As you sleep you pass through a sequence of sleep states - light sleep, deep sleep and REM sleep (快速眼动睡眠) - that repeats approximately every 90 minutes. The points in that cycle at which you wake can affect how you feel later, and may even have a greater impact than how long or little you have slept. Being wakened during a light phase means you are more likely to wake up cheerful and full of life and interest.SleepSmart records the distinct pattern of brain waves produced during each phase of sleep, via a headband equipped with electrodes (电极) and a microprocessor. This measures electric activity of the wearer's brain, and communicates wirelessly with a clock unit near the bed. You program the clock with the latest time at which you want to be wakened, and it then at the proper time wakes. you during the last light sleep phase before that.The concept was invented by a group of students at Brown University in Rhode Island after a friend complained of waking up tired and performing poorly on a test. 'As sleep-deprived (剥夺) people ourselves, we started thinking of what to do about it,' says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea. They have almost finished a prototype and plan to market the product by next year.SleepSmart is a clock thatA．enables you to go to sleep.B．enables you to sleep deeply.C．enables you to get up early.D．wakes you up during your last light sleep phase.

A.
The
B.
As
C.
SleepSmart
D.
The
E.
SleepSmart
F.enables
G.
B．enables
H.
C．enables
I.
D．wakes
J.

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