根据原子的特征发射光谱来研究物质的结构和测定物质的化学成分的方法称为()。

题型:填空题

问题:

根据原子的特征发射光谱来研究物质的结构和测定物质的化学成分的方法称为()。

考点:环境科学技术及资源科学技术环境监测环境监测题库
题型:填空题

贵州的民族节日大体可以分为三大类:第一类是()性节日,如“鼓社节”等;第二类是()性节日,如“吃新节”等;第三类是()性节日,如“姊妹节”等。()性节日最多,几乎占全部节日的80%。

题型:填空题

下列哪种药物中毒忌用碳酸氢钠溶液洗胃()。

A.敌百虫

B.敌敌畏

C.乐果

D.1605农药

E.1059农药

题型:填空题

Short and shy, Ben Saunders was the last kid in his class picked for any sports team. "Football, tennis,cricket — anything with a round ball, I was useless." he says now with a laugh. But back then he was the object of jokes in school gym classes in England's rural Devonshire.

It was a mountain bike he received for his 15th birthday that changed him. At first the teen went biking alone in a nearby forest. Then he began to cycle along with a runner friend. Gradually, Saunders set his mind building up his body, increasing his speed, strength and endurance. At age 18, he ran his first marathon.

The following year, he met John Ridgway, who became famous in the 1960s for rowing an open boat across the Atlantic Ocean. Saunders was hired as an instructor at Ridgway's school of Adventure in Scotland, where he learned about the older man's cold-water exploits (成就). Intrigued, Saunders read all he could about Arctic explorers and North Pole expeditions, then decided that this would be his future.

Journeys to the Pole aren't the usual holidays for British country boys, and many people dismissed his dream as fantasy. "John Ridgway was one of the few who didn't say, 'You are completely crazy,'" Saunders says.

In 2001, after becoming a skilled skier, Saunders started his first long-distance expedition toward the North Pole. He suffered frostbite, had a closer encounter (遭遇) with a polar bear and pushed his body to the limit.

Saunders has since become the youngest person to ski alone to the North Pole, and he's skied more of the Arctic by himself than any other Briton. His old playmates would not believe the transformation.

This October, Saunders, 27, heads south to explore from the coast of Antarctica to the South Pole and back, an 1800-mile journey that has never been completed on skis.

小题1:The turning point in Saunders'life came when ________.

A.he started to play ball games

B.he got a mountain bike at age 15

C.he ran his first marathon at age 18

D.he started to receive Ridgway's training小题2:We can learn from the text that Ridgway ________.

A.dismissed Saunders' dream as fantasy

B.built up his body together with Saunders

C.hired Saunders for his cold-water experience

D.won his fame for his voyage across the Atlantic小题3:What do we know about Saunders?

A.He once worked at a school in Scotland.

B.He followed Ridgway to explore the North Pole.

C.He was chosen for the school sports team as a kid.

D.He was the first Briton to ski alone to the North Pole.小题4:The underlined word "Intrigued" in the third paragraph probably means ________.

A.Excited

B.Convinced

C.Delighted

D.Fascinated小题5:It can be inferred that Saunders' journey to the North Pole ________.

A.was accompanied by his old playmates

B.set a record in the North Pole expedition

C.was supported by other Arctic explorers

D.made him well-known in the 1960s

题型:填空题

流感的流行病学特征有()

A.甲型、丙型流感易引起流行

B.经空气飞沫传播

C.多发生在春季

D.患者及隐性感染病毒携带者是主要传染源

E.不同亚型之间有交叉免疫

题型:填空题

白合金艉轴承的主要损坏形式有()。Ⅰ.过度磨损;Ⅱ.严重腐蚀;Ⅲ.擦伤;Ⅳ.裂纹和剥落;Ⅴ.烧熔。

A.Ⅱ+Ⅲ

B.Ⅰ+Ⅳ+Ⅴ+Ⅲ

C.Ⅲ+Ⅳ+Ⅴ

D.Ⅱ+Ⅲ+Ⅳ

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