在一个链队中,如果front和rear是队首和队尾的指针,则插入一个结点s(的操作是

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问题:

在一个链队中,如果front和rear是队首和队尾的指针,则插入一个结点s(的操作是 【2】

考点:计算机等级考试VISUALFOXPRO二级VISUALFOXPRO笔试20
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下列有关描述及对应的离子方程式全部正确的是

A.酸性高锰酸钾可使草酸溶液褪色:2MnO4-+ 5C2O42- + 16H+ = 2Mn2++ 10CO2 ↑+ 8H2O

B.在溶液中,FeI2与等物质的量的Cl2反应:2Fe2++2I+2Cl2=2Fe3++I2+4Cl

C.NaHCO3溶液中滴加少量澄清石灰水:2HCO3+Ca2++2OH= CaCO3↓+2H2O+ CO32—

D.0.01 mol·L1 NH4Al(SO4)2溶液与0.02 mol·L1Ba(OH)2溶液等体积混合: Al3+2SO+2Ba2+4OH=2BaSO4↓+AlO2+2H2O

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原产高纬度地区的高温短日照植物引到低纬度地区种植,生育期会()

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输血时主要考虑供血者

A.红细胞不被受血者红细胞所凝集
B.红细胞不被受血者血浆所凝集
C.红细胞不发生叠连
D.血浆不使受血者血浆发生凝固
E.血浆不使受血者红细胞凝集

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施工安全技术交底的主要内容之一是做好“四口”、 “五临边”的防护设施,其中“四口”是指( )。

A) 通道口、楼梯口、电梯井口、工地入口
B) 通道口、楼梯口、电梯井口、预留洞口
C) 工地入口、楼梯口、工地出口、预留洞口
D) 通道口、楼梯口、工地人口、工地出口

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Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time! With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

29()

A.quiet 

B.hot 

C.dirty 

D.crowded

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