战胜挫折，我们必须做到[ ] ①保持乐观的态度 ②开拓进取，勇于创新 ③轻视挫折

根据实际增长曲线的不同，所采用的回归公式有多种，其中最为完善的是（）

A.线性回归法

B.指数回归法

C.对数回归法

D.生长曲线法

急性心肌梗死24小时内发生急性左心功能不全的处理，下列哪项不适宜（）

A.应用吗啡

B.速尿

C.多巴酚丁胺

D.硝普钠静脉点滴

E.快速洋地黄化

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在接待过程中，由于旅行社原因导致误机时，游客提出改乘其他交通工具，导游要______，协助游客办理相关手续。

The first people to inhabit North America came from Asia. Scientists had hypothesized that these people traveled across a now-submerged landmass that connected the two continents until 14,000 years ago, depending for food only on the land animals they hunted as they traveled. Recent discoveries have led to the new hypothesis that the first people came by boat along the southern shore of the landmass, eating fish and sea mammals.
Which of the following, if true, most ply supports the new hypothesis by casting doubt on the earlier hypothesis

A．The landmass connecting North America and Asia extended very far to the north.

B．In Europe, maritime cultures primarily dependent on the sea for food developed no earlier than 10,000 years ago.

C．People living in Asia at the time the two continents were connected hunted land animals for food.

D．The landmass was so bitterly cold that its vegetation would have been too sparse to support land animals.

E．(E) Sophisticated and mature North American and Asian cultures that display great similarities to each other existed as far back as 8,000 years ago.