三氯化磷分子的空间构型是三角锥形而不是平面正三角形,下列关于三氯化磷分子空间构型

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问题:

三氯化磷分子的空间构型是三角锥形而不是平面正三角形,下列关于三氯化磷分子空间构型理由的叙述,不正确的是(   )

A.PCl3分子中三个共价键的键长、键角都相等

B.PCl3分子中的P-Cl键属于极性共价键

C.PCl3分子中三个共价键键能、键角均相等

D.PCl3是非极性分子

考点:化学键与化学反应中能量变化的关系
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Being on the road at 3:15 am to drive 450 kilometers wasn't in my plans for the weekend. I had been looking forward to a few     days to prepare myself for the following busy     .
My son, Simon, and his good friends were heading for the snowfield. I     my car to make sure that everyone could get to the drop-off point so that they could get together and enjoy their week's     by snowboarding and skiing.
The only thing that l was thinking of on my journey was that as soon as I     and said goodbye,1 would make the trip      ,in total, a round trip of 900 kilometers in just 10 hours. Such a long drive in one day was frightening, particularly as I was looking forward to relaxation.
Simon and I talked, on our way, a little about his break and a whole lot of his school subjects. It was great to have this time with him as we      spent five continuous hours together.
On my return trip, I     a strange sense of loneliness in some heavy morning fog. Within an hour it cleared. I spent the next four hours listening to some CDs and enjoying the scenery. Surprisingly, after my long trip home l was     refreshed(恢复精神)and energized even though 1 was physically tired. And I knew that l would have a good sleep that evening.
A change in your environment, no matter how great, can provide you with the chance to look at something from different ways, as well as to be refreshed and energized. Now I'm looking forward to my next       event and many more chances to spend quality time with those who are important to me and make my life more rewarding.
小题1:
A.surprisingB.relaxingC.movingD.exciting
小题2:
A.hourB.dayC.weekD.month
小题3:
A.offeredB.parkedC.droveD.lent
小题4:
A.performanceB.excitementC.activityD.break
小题5:
A.restedB.startedC.arrivedD.left
小题6:
A.forwardB.backC.outD.away
小题7:
A.alwaysB.usuallyC.sometimeD.seldom
小题8:
A.developedB.showedC.lostD.kept
小题9:
A.greatlyB.completelyC.immediatelyD.mentally
小题10:
A.plannedB.unexpectedC.discussedD.prepared
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男,65岁,进行性排尿困难3年,夜尿6~8次,夜间偶有尿失禁。前列腺明显增大,有弹性,残余尿150ml,血压140/85mmHg,心肺功能正常,最好的治疗方法是()

A.经 * * 气囊高压扩张术

B.耻骨上膀胱造瘘

C.前列腺切除术

D.5α还原酶抑制剂治疗

E.α受体阻滞剂

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小明家新购置了一台电热水器,电热水器的铭牌如图甲所示。若自来水的温度是20 ℃,加满水后,小明将温控开关调到如图乙所示的位置。接通电源,加热指示灯亮,当水温达到设定温度时,加热指示灯熄灭。请你帮助小明解答下列问题:

(1)电热水器正常工作时,其发热电阻丝的电阻为多少?

(2)加热指示灯从亮到灭的过程中,热水器中的水一共吸收多少热量?

(3)若在晚间用电高峰时,电路的实际电压只有198 V,热水器加热的效率为80%,从接通电源到指示灯熄灭需要多少时间?[ C=4.2×103J/(kg·℃),不考虑发热电阻丝的电阻随温度变化,最后结果保留一位小数]

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【案例4】某建设工程,建设单位决定进行公开招标。经过资格预审,A、B、C、D四家施工单位通过了审查,并在规定时间内领取了招标文件。投标人A在取得了招标文件后,认真核对了工程量,根据当前当地市场状况、材料供求情况和材料价格情况,基于询价,并对措施项目作出处理后确定报价。在报价全部完成后,投标人A按照规定时间将投标文件送达了招标单位。投标人D在赶往指定地点提交投标文件的时候,由于交通拥堵,投标人D察觉可能在投标截止时间前不能赶到,因此给招标人打电话,说明理由和自己的报价,要求参加竞标,投标文件将随后补上。招标人同意了该要求。评标过程中,招标人采用综合评议法,最终选定投标人D为中标单位。对此结果,其他投标人均表示异议。【问题】

什么是措施项目投标人在投标时对措施项目应当如何处理

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记者要自觉地遵守职业道德。当前在反对以稿谋私方面,首先要坚决反对( )

A.采写人情稿

B.见利忘义

C.有偿新闻

D.拿原则作交易

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