摩擦性失业是一种自愿失业。
参考答案:错
解析:摩擦性失业既有自愿失业,也有非自愿失业。
The terror attack at a Kunming railway station in southwest China's Yunnan Province, 29 lives and leaving 143 , has brought condemnation from around the world this week.
A.claimed; wounding
B.claiming; wounded
C.claimed; wounded
D.claim; wound
下列有关自主神经与心脏传导系统的描述,不正确的是()
A.心脏传导系统受迷走与交感神经双重支配
B.迷走神经兴奋性增加可抑制窦房结的自律性与传导性
C.迷走神经兴奋性增加可缩短窦房结与周围组织的不应期
D.迷走神经兴奋性增加可减慢房室结的传导并延长其不应期
E.交感神经的作用与迷走神经相反