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【单选题】
The teacher was busy ______ sums upon the blackboard. She was too busy ______ the students' questions.A.
to write out answering
B.
to write out to answer
C.
writing out to answer
D.
writing out answering
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【单选题】After a quarrel, the couple finally settled down _____ their kid's future education. [ ]
A.
to discussing
B.
discuss
C.
of discussing
D.
discussing
【单选题】能说明CH 4 分子的5个原子不在同一平面而为正四面体构型的是( )
A.
两个键之间夹角为109°28′
B.
C—H键为极性共价键
C.
4个C—H键的键能、键长相同
D.
碳的价层电子都形成共价键
【单选题】The couple finally bought the house they wanted, for they______enough money.
A.
had saved
B.
were saving
C.
would save
D.
were to save
【多选题】X、Y、Z是原子序数依次增大且属于不同周期的三种常见短周期元素，三种元素相互之间可以形成1︰1型的化合物M、N、R，常温下M、N为固体，R为液体。M、N遇到水都能产生气体，而且产生的气体相互可以化合，下列说法正确的是
A.
R中有极性共价键和非极性共价键
B.
Z是地壳中含量最多的元素
C.
三种化合物都是共价化合物
D.
M、N投入水中所得溶液中溶质相同
【单选题】Finally the couple decides to
A.
go and see a horror film.
B.
stay home and watch TV.
C.
go to see a movie in the neighborhood.
D.
go downtown next Friday.
【单选题】What do the couple decide to do finally?
A.
Go and see a horror film.
B.
Stay at home and watch an Ice Bucket Challenge on TV.
C.
Go to a movie in the neighborhood
D.
Go downtown next Friday.
【单选题】某企业购入丙材料,增值税专用发票上注明货款 20000元,增值税3400元,发生运杂费300元,则丙材料的采购成本为( )。
A.
20000 元
B.
23400 元
C.
20300 元
D.
23700 元
【单选题】短周期元素X、Y、Z、W的原子序数依次增大，其中Y、Z原子的核外电子数之和与X、W原子的核外电子数之和相等，Z单质可以用来冶炼其它熔点较高的金属，X和W间可形成一种能产生酸雨的化合物，则下列说法不正确的是
A.
原子半径从大到小顺序为：W>Z>Y>X
B.
X与Y可形成既含离子键又含非极性共价键的化合物
C.
X、W分别形成简单的氢化物中，前者的沸点高
D.
X形成单核阴离子的核外电子数与Y、Z、W原子的核外内层电子数相同
【单选题】Q10: What do the couple decide to do finally?
A.
Go and see a horror film.
B.
Stay at home and watch an Ice Bucket Challenge on TV.
C.
Go to a movie in the neighborhood.
D.
Go downtown next Friday.
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