钢与铝及其合金焊接时,应采用的焊接方法是()。A.焊条电弧焊 B.CO2焊 C.埋弧

题型:单项选择题

问题:

钢与铝及其合金焊接时,应采用的焊接方法是()。

A.焊条电弧焊

B.CO2

C.埋弧焊

D.钨极压弧焊

考点:焊工技能考试焊接技师考试焊接技师考试题库
题型:单项选择题

健康教育与健康促进计划设计中通过健康问题分析可以了解和找出在该社区存在的主要健康问题或主要疾病;对疾病或健康问题有影响的危险因素;重点受累人群及其特征等内容。

获得上述结果多采用的方法是()。

A.流行病学调查

B.统计与管理学

C.社会学调查

D.健康教育学

E.社会医学

题型:单项选择题

下列有关元素周期律的叙述中,正确的是[ ]

A.非金属性强弱:F2<Cl2          

B.金属性强弱:K<Na

C.酸性强弱:H2SO4<HClO       

D.碱性强弱:NaOH<Mg(OH)2

题型:单项选择题

对急性阑尾炎的描述,错误的是()

A.阑尾腔正常时中央部呈无回声

B.回盲区积液是化脓性阑尾炎或阑尾周围积脓的表现

C.阑尾炎症可继发肝脓肿

D.肿胀阑尾呈一有盲端的管状结构,不蠕动

E.阑尾穿孔时,膈下一般不出现游离气体

题型:单项选择题

In the ______Approach, the teacher creates speeches which enable students to interact using the target language. Students are not forced to respond in the target language immediately.

题型:单项选择题

One day a businessman was going to another town to sell his goods (货物). He decided to take ten servants(仆人) with him. They would carry his goods and also some food to eat on the way. He said to one of the servants, "You are the smallest and the shortest one. You may carry the lightest load (担子). "The servant thanked him but took the biggest load. This was the bread to eat on the way.
The man said, "You’re foolish. That is the heaviest load." But the servant took up the load happily, and so they set off. After four hours they stopped for a rest. They all ate some of the bread. Then there was less bread for the servant to carry. Every time they ate some bread, the load became smaller and lighter. At the end of the trip, the servant had nothing to carry, and all the other servants still had a lot of things to carry.

On their way to the other town ______ .

A. one of the servants carried food but the others didn’t
B. no one carried food
C. all carried some food

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