下列两核间距最小的离子化合物是( ) A.KCl B.NaF C.HF D.Ca

题型:选择题

问题:

下列两核间距最小的离子化合物是(  )

A.KCl

B.NaF

C.HF

D.CaS

考点:键能、键长、键角离子化合物
题型:选择题

什么是铁路应急通信系统?

题型:选择题
My 9-year-old daughter and I were flying from our home in Carolina to spend a week with my husband in Florida.We were__ about the trip because we hadn't seen him for five months, and __  her Dad terribly.
As usual on the Charlotte-to-Miami flight, the plane was totally__ . Because we did not get our boarding passes until we__  at the gate, Kallie and I could not get seats together and were __  by the aisle(过道). I asked two passengers in my row if they would switch places with Kallie and me, __  we could be together. They __ , saying they thought they should stay in their assigned seats.
Meanwhile, a mother and her three children were in a _  several rows ahead of us. There had been a mistake in their boarding passes, and _  the whole family had been split up. The passengers in her row_  refused to move elsewhere. She was very__  about the younger boy sitting with strangers. She was in tears, yet nobody__  to help her.
There were a troop of Boy Scouts(童子军) on __ . Suddenly the Scout leader stood up and said, "Ma’am, I think we can help you." He then __  five minutes rearranging his group so that adequate space was __  for the family. The boys followed his directions cheerfully and without _ , and the mother's relief was obvious.
Kallie, however, was beginning to panic at the _   of not being next to me. I told her that there wasn’t anything I could do. __ , the man sitting next to the Scoutmaster, __  to me and asked, "Would you and your daughter like our seats?" __  to himself and the Scoutmaster. We traded seats and continued our trip, very much relieved to be together and watch the scenery from Kallie’s window seat.
小题1:
A.worriedB.excitedC.anxiousD.eager
小题2:
A.lovedB.considered C.imagined D.missed
小题3:
A.full B.crowded C.emptyD.overweight
小题4:
A.reached B.arrived C.landed D.knocked
小题5:
A.divided B.blocked C.separated D.connected
小题6:
A.in case B.even if C.as if D.so that
小题7:
A.prevented B.refused C.agreedD.promised
小题8:
A.panic B.hurryC.rush D.seat
小题9:
A.however B.otherwise C.therefore D.instead
小题10:
A.too B.even C.ever D.also
小题11:
A.concerned B.curious C.particular D.content
小题12:
A.suggestedB.offered C.provided D.supplied
小题13:
A.dutyB.watch C.board D.spot
小题14:
A.took B.cost C.paid D.spent
小题15:
A.convenient B.available C.probable D.comfortable
小题16:
A.permission B.excuseC.apology D.complaint
小题17:
A.thought B.end C.feeling D.sense
小题18:
A.Immediately B.Puzzlingly C.Clearly D.Amazingly
小题19:
A.turned up B.turned around C.turned out D.turned away
小题20:
A.sticking B.keeping C.waving D.referring
题型:选择题

我国发生的严重急性呼吸综合征(SARS)很快波及到许多省市,这种发病情况称为()。

A.爆发

B.大流行

C.季节性升高

D.周期性流行

题型:选择题

落实科学发展观需要工程咨询推动经济发展方式转变的重点是( )。

A.经济的发展

B.全民素质提高

C.精神文明的建设

D.建设资源节约型社会

题型:选择题

当事人在法定期限内不申请行政复议或者提起行政诉讼,又不履行行政决定的,没有行政强制执行权的行政机关可以自期限届满之日起()个月内,申请人民法院强制执行?()

A、一

B、二

C、三

D、六

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