一台计算机对n个数据源进行分时采集，送入主存，然后分时处理。采集数据时最好方案是使用

The 5S rRNA differs from the other cellular rRNAs in which of the following ways ( )

A．The genes are located outside the nucleolus(核仁).

B．The genes are transcribed by RNA polymerase III.

C．The promoter region of the 5S rRNA gene is internal to the gene.

D． all of the above

Yesterday there wasn’t time for breakfast, so she had to        without.

A．come

B．go

C．struggle

D．manage

铝合金车轮最主要的优点是（）

A、散热性好

B、价格低

C、美观

D、重量轻

肺炎杆菌肺炎出现（）。

A.咯血颜色鲜红

B.铁锈色血痰

C.砖红色胶冻样黏痰

D.粉红色浆液性泡沫样痰

E.粉红色乳样痰

简述确定课程与教学目标的基本环节。