假设E公司股票目前的市场价格为10元，半年后股价有两种可能：上升33.33%或者降低

In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
Questions 11 to 14 are based on the following passage. At the end of the passage, you will be giv en 20 seconds to answer the questions.
Now, listen to the passage.

According to the research by NASA, an afternoon nap ______.

A．can greatly improve the efficiency of work

B．can fall into a deep sleep and will wake up groggy

C．makes people suffer a decline in their alertness

D．is an admission of weakness

PEST分析法主要是用于对外部环境中的( )进行分析。

A．微观环境

B．宏观环境

C．行业环境

D．经营环境

用（）方法预测非耐用消费品需要的可靠性较低，用在耐用品方面较高，用在产业用品方面则更高。

A.购买意向调查法

B.销售人员综合意见法

C.专家意见法

D.市场试验法

甲状腺上动脉多发自（）。

A.甲状颈干

B.颈外动脉

C.无名动脉

D.主动脉

E.颈内动脉

开航前（），值班驾驶员应会同值班轮机员核对船钟、车钟、试舵等。

A、1小时

B、2小时

C、半小时

D、15分钟