以下哪一项不是规模企业的云计算之路（）A、全员虚拟化 B、云计算管理平台应用 C、运维变

在我国，大量的民营企业集中在传统产业，而且存在着企业规模小、技术水平低、能源和资源消耗高等问题。鼓励和引导民营经济健康发展，就要[ ]

①使民营经济成为社会主义经济的重要组成部分　

②在优化产业结构的基础上提高效益、降低能耗　

③增强民营经济在国民经济中的控制力和影响力

④支持民营企业科技创新，增强民营经济竞争力

A．①②

B．①③

C．②④

D．③④

下列关于编码链的叙述错误的是

A．与DNA中能转录生成RNA的单链互补

B．它并非永远在同一股单链上

C．它与mRNA的序列完全一致

D．编码链可称为反义链或Crick链

E．文献刊出的DNA序列一般都是编码链

60kg/m不能伸缩的钢轨，当轨温变化10℃时，钢轨内产生约（）的温度力。

Despite (1) that alcoholic beverages may (2) , a leading medical expert is advising: don’t (3) just yet.
Anybody who’s ever worked in a hospital sees the hospital is full of patients that have (4) disease, but the hospital is not full of patients that have disease related to cholesterol and (5) .
In an (6) in the current New England Journal of Medicine, Dr. Goldberg of Columbia University said it is time to see (7) prevents heart disease. Such a study would give (8) to one group of heart disease patients and not to another, and see (9) .
In the latest study, which followed (10) over a 12-year period, researchers found that those who drank (11) drinks per week (12) of heart attack by (13) compared to (14) .
The lead author, (15) Kenneth Mukamal of Beth Israel Deaconess Medical Center in Boston, insists his study is (16) . For one thing, other studies have not looked at (17) .
Dr. Mukamal says (18) also appear to settle which alcoholic beverage are (19) . "Beer and spirits, beer and liquor, were most ply (20) ."

药品的微生物污染源：（）、（）、厂房与设备、药品生产用（）、（）、昆虫和其它啮齿动物。