He described where they____________ and

题型:选择题

问题:

He described where they____________ and told how they________across

the United States.  [ ]

A. landed ;  moved  

B. land ;  move  

C. had landed; were moving  

D. have landed; are moving

考点:过去完成时过去进行时
题型:选择题

A technology that all of the firms in a perfectly competitive industry are using in their production process has been banned by new legislation. What will most likely be the effect if these firms stop using this technology()

A. The quantity that the industry will supply at a given price will be reduced.

B. Firms will adopt a different technology that reduces their costs of production.

C. The number of firms in the industry will increase market price.

题型:选择题

在社会主义市场经济条件下,国家计划提出一定时期国民经济和社会发展的基本战略、基本任务和宏观调控目标,确定国民经济和社会发展的重大比例、结构、速度,以及需要配套实施的基本经济政策,集中体现了计划的()。

A.宏观性

B.客观性

C.权威性

D.战略性

E.政策性

题型:选择题

男,48岁,糖尿病5年,发热3天,咳痰中带血丝,肺部未闻及啰音,胸片右肺上野及中野密度较淡浸润影,似有透光区,WBC9.3×109/L。

下列哪项检查对诊断最有意义()

A.血培养

B.血沉

C.痰细菌培养

D.痰抗酸杆菌检查

E.纤维支气管镜

题型:选择题

在必要的架空电力线路保护区的界线上,应设立标志,并标明保护区的()和保护规定。

A.污染情况

B.宽度

C.温度

D.湿度

题型:选择题

透水土撑法抢护滑坡险情适用于()的堤段。

A.临河水位低

B.背水堤坡排渗不畅

C.滑坡范围较大

D.透水性土料不够丰富或取土较困难

E.堤坡缓、断面大

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