希克斯·马歇尔派生需求定理是与( )有关的定理。

A．劳动力需求弹性

B．劳动力供给弹性

C．劳动力供给自身工资弹性

D．劳动力需求自身工资弹性

Approximately, forty percent of Americans see themselves as shy, while only 20 percent say they have never suffered from shyness at some point in their lives. Shyness occurs when a person’s apprehensions are so great that they (62) his making an expected or desired social response. (63) of shyness can be as minor as (64) to make eye contact when speaking to someone, (65) as major as avoiding conversations whenever possible.
"Shy people tend to be too (66) with themselves, " said Jonathan Cheek, a psychologist, who is one of those at the forefront of current research on the topic," (67) , for a smooth conversation, you need to pay attention to the other person’s cues, (68) he is saying and doing. But the shy person is full of (69) about how he seems to the other person, and so he often (70) cues he should pick up. The result is an awkward lag in the conversation. Shy people need to stop focusing on (71) and switch their attention to the other person. "
(72) , shy people by and large have (73) social abilities than they think they do. (74) Dr. Cheek videotaped shy people talking to (75) , and then had raters(评估者) evaluate how socially skilled the people were, he found that, in the (76) of other people, the shy group had few (77) problems. But when he asked the shy people themselves (78) they had done, they were unanimous in saying that they had been social hops (失败).
"Shy people are their own (79) critics, " Dr. Cheek said, " (80) , "he added, "shy people feel they are being judged more (81) than they actually are, and overestimate how obvious their social anxiety is to others. \

A. best B. justice C. fair D. worst