问题 单项选择题

下列各项所述的数字不是6的是()

A.在NaCl晶体中,与一个Na+最近的且距离相等的Cl-的个数

B.在金刚石晶体中,最小的环上的碳原子个数

C.在二氧化硅晶体中,最小的环上的原子个数

D.在石墨晶体的片层结构中,最小的环上的碳原子个数

答案

参考答案:C

阅读理解
阅读理解。
         In the past, when people had problems, they went to their families or friends to get advice. Today it is     
possible to get advice from radio shows, TV programs and telephones hot lines, too. A hot line is a telephone      
line that offers a direct way of getting in touch with advisers. Most hot lines are completely anonymous callers 
do not have to say their names or telephone numbers. Most hot lines are usually free, too. Callers do not have    
to pay for advice or the phone calls even if the calls are long distance. At some hot lines, the advisers are          
volunteers. Other hot lines pay their advisers for their work. Usually the advisers are full-job people with years  
of education and experience, but sometimes, the advisers have only taken a short class before starting to work  
on the hot line. All the advisers listen to people and help them solve their problems.
1. When people call the hot line advisers, they               .
[ ]
A. often give their names and telephone numbers
B. generally have to pay for the long distance calls
C. usually pay nothing for most of the calls and advice
D. always try to get in touch with the volunteer advisers
2. How do the hot line advisers work?
[ ]
A. They do what the callers tell them to do.
B. They listen to the callers and take their advice.
C. They give the callers advice.
D. They go to the callers' houses to help them.
3. The writer of the article seems to think that              .
[ ]
A. with hot lines people won't get advice from their families or friends
B. hot lines help the callers a lot
C. people had better pay for the advice and phone calls
D. the hot line advisers will solve all of the callers' problems
单项选择题