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【简答题】
下图中A、B、C、D、E均为有机化合物。已知:C能与NaHCO 3 溶液发生反应,C 和D的相对分子质量相等,且D催化氧化的产物不能发生反应。 回答下列问题: (1)C分子中官能团的名称是__________;化合物B不能发生的反应是_________。(填字母序号)  a.加成反应b.水解反应c.消去反应d.酯化反应 (2)写出E的结构______________________________________。 (3)写出反应①的化学方程式:_____________________________________________。 (4)同时符合下列三个条件的B的同分异构体有多种: a.苯环上有二个取代基且苯环上的一氯代物有2种 b.能与FeCl 3 溶液发生显色反应 c.能发生水解反应 试写出lmol B的同分异构体中,能与3molNaOH反应的结构_______________。
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【多选题】Quiz one for Unit I Blanking –filling : in the following table, there are ten words/phrases; choose the right one to fill in the sentences. Direction: each word/phrase could be used only once. Write t...
A.
be trapped;
B.
frozen;
C.
monologues ;
D.
nothing but;
E.
is endowed;
F.
if anything;
G.
lest;
H.
reel;
I.
slipping;
J.
was given to; 1.On rainy days, we should walk in a cautious way to avoid ____(1)____. 2. When Mr. Houghton was outside in a hideous wind, the fresh air seemed to ___(2)_____with his chest. He would ____(3)____ and his face turned pale. 3. In the little boy’s eyes, Venus was _____(4)___ in great fear, and Rodin’s Thinker was ___(5)_____a naked, muscular man. 4. She ____(6)____with great talents, and it should be no wonder she has achieved great success. 5. He didn’t tell his father about the exam result ____(7)____he get mad with him. 6. The headmaster in my grammar school was not good at thinking. He was, ___(8)_____, unable to think at all. 7. Mr. Houghton ____(9)____highly moral speeches, however his ___(10)_____were usually interrupted by a pretty girl passing by.
【单选题】Which of the following may NOT be the reason of eating disorders?
A.
Trying to keep the weight low.
B.
The fierce social competition.
C.
Maintaining a muscular but thin physique.
D.
Genetic or chemical components.
【单选题】The maximum Blood Alcohol Concentration (BAC) rate on board shall not be more than by weight any time when being testedBut watch-keepers are not allowed to drink any alcoholic beverage before their wa...
A.
0.08% /4 hours
B.
0.008%/2 hours
C.
0.04%/4 hours
D.
0.04%/2 hours
【简答题】Read the following sentences and try to match the English sentences with their Chinese equivalents.A. Excuse me, is there a vacant place?B. It’s very kind of you to invite me, but I have a prior engag...
【多选题】Blanking –filling : in the following table, there are ten words/phrases; choose the right one to fill in the sentences. Direction: each word/phrase could be used only once. Write the corresponding Rom...
A.
be trapped;
B.
frozen;
C.
monologues ;
D.
nothing but;
E.
is endowed;
F.
if anything;
G.
lest;
H.
reel;
I.
slipping;
J.
was given to; 1.On rainy days, we should walk in a cautious way to avoid ____(1)____. 2. When Mr. Houghton was outside in a hideous wind, the fresh air seemed to ___(2)_____with his chest. He would ____(3)____ and his face turned pale. 3. In the little boy’s eyes, Venus was _____(4)___ in great fear, and Rodin’s Thinker was ___(5)_____a naked, muscular man. 4. She ____(6)____with great talents, and it should be no wonder she has achieved great success. 5. He didn’t tell his father about the exam result ____(7)____he get mad with him. 6. The headmaster in my grammar school was not good at thinking. He was, ___(8)_____, unable to think at all. 7. Mr. Houghton ____(9)____highly moral speeches, however his ___(10)_____were usually interrupted by a pretty girl passing by.
【简答题】We have all experienced days when everything goes wrong. A day may begin well enough, but suddenly everything seems to get out of control. It seems as if a single unimportant may cause a number ...
【简答题】We have all experienced days when everything goes wrong. A day may begin well enough, but suddenly everything seems to get out of control. It seems as if a single unimportant may cause a number ...
【简答题】In the case of cargo which is bulky in relation to its weight the chargeable weight will be established on the basis of volume rather than gross weight.( )
【单选题】The interviewees opinion of exercising at desk shows that it is
A.
a good way of losing weight.
B.
a solution that doesn't work.
C.
an efficient way of improving health.
D.
a bad way of wasting time.
【单选题】在构建图灵机器人的请求参数对象时,参数key的含义是()
A.
在图灵机器人上注册的apikey
B.
自定义的用户标识
C.
将要发送的文字信息
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