【单选题】对个体疼痛时出现生理、心理和行为方面的改变, 不正确 的描述是
A.
急性疼痛伴随的血压升高是由于交感神经系统过度兴奋所致
C.
慢性疼痛和剧烈疼痛的病人机体内源性镇痛物质增加
【判断题】三相电路中,三相负载相电压的相量和为零,那么这三个正弦电压一定对称。()
【单选题】对个体疼痛时出现生理、心理和行为方面的改变,不正确的描述是
A.
急性疼痛伴随的血压升高是由于交感神经系统的过度兴奋所致
C.
慢性疼痛和剧烈疼痛的病人机体内源性镇痛物质增加
【单选题】Reservation price is:
A.
the maximum amount a customer would be willing to pay for a unit of output.
B.
the minimum price at which a seller would be willing to supply the product.
C.
always equal to the marginal cost.
D.
the same as market price.
【单选题】若f(x)连续,F(x)是f(x)的一个原函数,则()
C.
当f(x)是周期函数时,F(x)必为周期函数。
D.
当f(x)是单调函数时,F(x)必为单调函数。
【单选题】若f(x)是闭区间I上的连续函数,则f(x)在闭区间I上的原函数
【判断题】三相电路中,三相负载相电压的相量和为零,那么这三个正弦电压定对称。
【单选题】个体疼痛时出现生、心和行为方面的改变,叙述错误的是
A.
急性疼痛伴随的血压升高是由于交感神经系统的过度兴奋所致
D.
慢性疼痛和剧烈疼痛的患者机体内源性镇痛物质增加
【单选题】Here are two negotiations about selling and buying a second-hand famous brand laptop computer. Case
A.
: The seller hopes to get RMB5,000 by selling the laptop, and his reservation price is RMB4,000. From the buyer's point of view, he notices that the computer may worth RMB3,500, but he will just bid RMB2,000 in the first place. Case
B.
: The seller hopes to get RMB6,000 by selling the laptop, and his reservation price is RMB4,500. From the buyer's point of view, he notices that the computer may worth RMB5,000, but he will just bid RMB3,000 in the first place. (25.0分)