Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.

The speaker’s attitude toward college education is______.

A．reluctant

B．negative

C．dubious

D．positive

患儿男，生后2天，出生体重为2400g。因吸入性肺炎入院，入院时患儿呼吸急促，口唇稍发绀。即置于辐射保暖床上抢救。

该患儿吸氧的流量应选择每分钟为（）

A.1L

B.2L

C.3L

D.4L

E.5L