问题 填空题

(14分)由淀粉和其他无机原料,合成环状化合物H:

写出下列物质的结构简式:

A.________________,

B._________________,

C._________________,

D._________________,E._________________,F._________________,G._________________。

答案

CH2OH(CHOH)4CHO  CH3CH2OH  CH2==CH2   HOCH2CH2OH

OHC—CHO  HOOC—COOH

根据H的结构可推测E为HOCH2CH2OH,G为HOOC—COOH,则F为OHC—CHO,递推,D为,C为CH2==CH2,B为C2H5OH,A为C6H12O6(葡萄糖)。

单项选择题

A recent poll indicated that half the teenagers in the United States believe that communication between them and their parents is (1) and further that one of the prime causes of this gap is (2) listening behavior. As a(an) (3) in point, one parent believed that her daughter had a severe (4) problem. She was so (5) that she took her to an audiologist to have her ear tested. The audiologist carefully tested both ears and reported back to the parent:"There’s nothing wrong with her hearing. She’s just (6) you out. "

A leading cause of the (7) divorce rate (more than half of all marriages end in divorce) is the failure of husbands and wives to (8) effectively. They don’t listen to each other. Neither person (9) to the actual message sent by the other.

In (10) fashion, political scientists report that a growing number of people believe that their elected and (11) officials are out of (12) with the constituents they are supposedly (13) Why Because they don’t believe that they listen to them. In fact, it seems that sometimes our politicians don’t even listen to themselves. The following is a true story: At a national (14) conference held in Albuquerque some years ago, then Senator Joseph Montoya was (15) a copy of a press release by a press aide shortly before he got up before the audience to (16) a speech. When he rose to speak, (17) the horror of the press aide and the (18) of his audience, Montoya began reading the press release, not his speech. He began, "For immediate release. Senator Joseph M. Montoya, Democrat of New Mexico, last night told the National... " Montoya read the entire six page release, (19) with the statement that he "was repeatedly (20) by applause.

1()

A.scarce

B.little

C.rare

D.poor

名词解释