家庭燃气灶一般用气门(用来调节燃气的进气量)和风门(用来调节空气的进气量)来控制

题型:问答题

问题:

家庭燃气灶一般用气门(用来调节燃气的进气量)和风门(用来调节空气的进气量)来控制燃烧。

(1)若火焰焰色发黄并有少量黑烟产生,这时发生的是完全燃烧还是不完全燃烧?怎样操作才能使燃烧恢复正常?

(2)你家中使用的燃料是什么?这种燃料的优缺点各是什么?

考点:燃料的利用和新能源的开发燃烧与燃烧的条件
题型:问答题

In China, parents often tell their kids not to waste food. However, it's reported that a lot of food is wasted in restaurants every day.

Many people say when they eat out, they usually order a lot of dishes and they can't eat them up. One person in Chengdu, Sichuan Province says he takes away the leftovers. "Usually we'll have some leftovers after meals, because when I invite friends to eat out, I don't know how much they can eat, so I order lots of dishes to make sure everybody has enough food."

While another person in Fuzhou, Fujian Province says she never packs what is left on the dining table. "What I usually experience during eating out is a big meal. I seldom take away the leftovers because we often have other activities after the meals, and it's not convenient to take the leftovers. And when no one suggests taking away leftovers, I won't do so."

Some people say they only take away leftovers when they eat out with family, but not if they eat with friends or colleagues (同事).

Food waste means washing money as well as wasting precious resources (宝贵资源). When food is thrown away, it becomes rubbish and can be harmful to the environment.

We should realize how important it is to save food. It's wise to order proper food for our meals. If there're leftovers, it's better to take home. To save food, we should start with ourselves and start from now.

小题1:_________food is wasted in the restaurants of our country every day.

A.Little

B.Many

C.Few

D.Much小题2:The underlined word "leftovers" means________ in Chinese.

A.残留物

B.离开

C.剩菜

D.垃圾小题3:Which of the following is not mentioned?

A.They wan to give the leftovers to the servers.

B.The person never packs what is left on the dining table.

C.The leftovers can be harm to the environment.

D.Some people only take away leftovers when they eat out with family小题4:From the passage, it's necessary for us to________ when we eat out.

A.pack our favorite food

B.invite our friend for dinner

C.throw the leftovers away

D.order proper food for our meal and finish all on our plates小题5:The best tile of this passage is__________

A.Washing Money

B.Saving Food

C.Throwing Away Leftovers

D.Saving Money

题型:问答题

参加了G20国伦敦峰会,属于新兴市场国家,号称“金砖四国”的是[ ]

A.中国印度新加坡俄罗斯

B.中国巴西俄罗斯印度尼西亚

C.中国印度巴西俄罗斯

D.中国新加坡韩国印度

题型:问答题

胆结石术后,取半坐卧位的目的是()

A.防止手术后出血

B.防止腹胀

C.减轻疼痛

D.减少伤口缝合张力

E.利于腹腔引流

题型:问答题

臀部注射青霉素治疗喉炎,药物到达患者部位流经的路线           (  )

A.臀部毛细血管→下腔静脉→左心房→左心室→肺动脉→肺部毛细血管→肺静脉→右心房→右心室→左动脉→各级动脉→喉

B.臀部毛细血管→下腔静脉→右心房→右心室→肺动脉→肺部毛细血管→肺静脉→左心房→左心室→左动脉→各级动脉→喉

C.臀部毛细血管→心室→静脉→身体各器官→动脉→心房→喉

D.臀部毛细血管→心房→静脉→身件各器官→动脉→心室→喉

题型:问答题

患者排出乳白色尿液,但加入1ml乙醚后能使尿液清亮,可能

A.脓尿

B.乳糜尿

C.晶体尿

D.血尿

E.气尿

更多题库