检验一瓶气体是否是二氧化碳的正确方法是[ ] A.将燃烧的木条伸入瓶中,观察木条

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问题:

检验一瓶气体是否是二氧化碳的正确方法是[ ]

A.将燃烧的木条伸入瓶中,观察木条是否熄灭

B.将燃烧的木条伸到集气瓶口观察木条是否熄灭

C.向瓶内倒少量澄清石灰水,观察石灰水是否变浑浊

D.放入一只小动物,观察小动物能否存活

考点:二氧化碳的检验和验满
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There was a robbery at City Central Bank last yesterday afternoon. Two men entered the bank at about 4 p.m. and told the bank teller on duty to give them $ 1,000,000. The robbers were carrying guns(枪) and wearing black masks(面具) to cover their faces. The robbers told all the customers (顾客)in the bank to lie down on the floor. Witnesses (证人)said that everyone in the bank was very frightened and did what the robbers told them.

The teller agreed to give them the money but told them they’d have to wait a few minutes. She said the bank manager would have to get the money out of the safety. As the robbers were waiting for the money. the teller tried to press an alarm button(按警报按钮) that was hidden under the counter. It was a silent alarm, so the robbers didn’t realize it had been set off.

Just as the manager arrived with the money, ten police officers entered the bank. The robbers were very surprised that the officers caught them easily. The robbers are now in custody(拘留) , and will appear in court next week.

Police congratulated Miss Alston , the bank teller , on brave act. The bank manager said that he would give Miss Alston a week’s vacation to thank her.

小题1:Everyone in the bank did what the robbers told them because _________.

A.they were frightened

B.the robbers were very polite

C.the bank manager told them to

D.they knew the police were coming小题2:The bank teller said the money was __________.

A.under the counter

B.on the floor

C.in custody

D.in the safety小题3:What did the bank teller do ?

A.She telephoned the police

B.She didn’t want to give the money to the robbers

C.She got the money out of the safe.

D.She pressed an alarm button.小题4:The police caught the robbers so easily because the robbers didn’t ________

A.know who the police officers were

B.get the money

C.expect the police arrived at the bank so quickly

D.expect the money to be in the safe

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计算108×(28+135÷5)时,先算______法,再算______法,最后算______法.

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承兑是汇票所特有的制度,但并不是所有的汇票都有需要进行承兑。通常应根据汇票的______及其______,来确定是否需要进行承兑。

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猪败血性链球菌病

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具有疏风养血、清热祛湿作用,用于治疗风疹、湿疹的方剂是()

A.败毒散

B.消风散

C.银翘散

D.当归补血汤

E.龙胆泻肝汤

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