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【多选题】
A anxiety F indicated K transition B introduce G resent L equivalent C acquaint H reinforce M regretting D acquisition 1 expressed N acceptable E saddled J sensible O shifting There is a special life stage that our generation goes through. It is the 1)_____  period, during which we move from teenage to adolescence.We learn who we are and what we stand for and what inspires us. Also, in this period we are2)________   with a lot of pressure from our parents who want us to make something out of ourselves. My parents have already expressed Feelings of 3)______   over my future with academics and life. When I expressed to them recently that I would not mind graduating in five years instead of four in order to study abroad to 4)_____   myself with the world, they seemed so shocked. That idea sounded foreign and to them was5) ________ to lack of ambition. Apart from that, my mother has 6) ________ to me that she is worried that I am not searching for a boyfriend. I 7) _______ this stupid idea of marrying out of college since it does not suit me one bit. Women today can get what they want out of life without a man, even children, as it becomes more 8) ________ for women to adopt children. I personally want to stay in school as long as I can to 9) ________ my academic work, possibly complete a law degree and start a career; and then after, and only after; begin to think about 10) ________ to marriage. If my math is correct, that means I will be more or less "ready" for marriage at the age of 29 or 30, the age when my mother had me.
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K
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E
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A
D.
C
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L
F.
I
G.
G
H.
N
I.
H
J.
O
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【简答题】阅读下列程序说明和C代码,回答问题1~2。 [说明] 本程序用古典的Eratosthenes的筛法求从2起到指定范围内的素数。如果要找出2至10中的素数,开始时筛中有2到10的数,然后取走筛中的最小的数2,宜布它是素数,并把该素数的倍数都取走。这样,第一步以后,筛子中还留下奇数3、5、7、9:重复上述步骤,再取走最小数3,宣布它为素数,井取走3的倍数,于是留下5、7。反复重复上述步骤,直至筛中为空...
【简答题】阅读下列算法说明和代码,将应填入(n)处的语句写在对应栏内。 【说明】 本程序用古典Eratosthenes;筛选法求从2起到指定范围内的素数。如果要找出2~10中的素数,开始时筛中有2~10的数,然后取走筛中最小的数2,宣布它是素数,并把该素数的倍数都取走。这样,第一步以后,筛子中还留下奇数3、5、7、9;重复上述步骤,再取走最小数3,宣布它为素数,并取走3的倍数,于是留下5、7。反复重复上述步...
【单选题】1953年,发生在日本熊本县水俣湾著名的环境公害“水俣病事件”是由哪种污染物引起的()
A.
B.
C.
D.
【单选题】H 3 AsO 3 与SnCl 2 在浓盐酸中可发生以下反应: 3SnCl 2 +12Cl - +2H 3 AsO 3 +6H + =2As+3M+6H 2 O 关于该反应的说法中正确的组合是 [     ] ① 氧化剂是H 3 AsO 3 ; ② 还原性:Cl - >As; ③ 每生成1 mol As,反应中转移电子的物质的量为2 mol; ④ M为SnCl 6 2- ; ⑤ M是氧化产物。
A.
①④⑤
B.
①②⑤
C.
①③④
D.
①③⑤
【单选题】下列反应中,不属于氧化还原反应的是 [     ]
A.
3Fe + 4H 2 O == Fe 3 O 4 + 4H 2
B.
2Na + 2H 2 O == 2NaOH + H 2 ↑
C.
SnCl 4 + 2H 2 O == SnO 2 + 4HCl
D.
2Na 2 O 2 + 2CO 2 == 2Na 2 CO 3 + O 2
【单选题】下列反应中,不属于氧化还原反应的是(  ) ①3Cl 2 +6KOH═5KCl+KClO 3 +3H 2 O ②2NO 2 +2NaOH═NaNO 3 +NaNO 2 +H 2 O ③SnCl 4 +2H 2 O═SnO 2 +4HCl ④3CCl 4 +K 2 Cr 2 O 7 ═2CrO 2 Cl 2 +3COCl 2 +2KCl.
A.
①②
B.
①③
C.
③④
D.
②④
【判断题】第5百分位,即5%的人身高等于,低于该值,95%的人高于该值,属于小身材值。
A.
正确
B.
错误
【简答题】SnCl 2 + H 2 O——
【判断题】分析纯的SnCl 2 H 2 O不能作滴定分析的基准物,其原因是易被氧化为Sn 4+ 。
A.
正确
B.
错误
【简答题】异丁烯在(CH 2 Cl 2 )中用SnCl 4 -H 2 O引发聚合。聚合速率R p ∝[SnCl 4 ][H 2 O][异丁烯] 2 。起始生成的聚合物的数均分子量为20000,1g聚合物中含3.0×10 -5 mol的羟基,不含氮。 写出该聚合反应的引发、增长、终止基元反应方程式。推导聚合反应速率和聚合度的表达式。什么情况下聚合速率对水或SnCl 4 是零级反应、对异丁烯是一级反应?
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