人体呼吸系统的组成是( ) A.肺和气管 B.呼吸道和肺 C.呼吸道和支气管 D

题型:选择题

问题:

人体呼吸系统的组成是(  )

A.肺和气管

B.呼吸道和肺

C.呼吸道和支气管

D.气管和支气管

考点:呼吸系统的组成和功能
题型:选择题

Mr. Jones had a nice, brown coat . He loved it very much, but his wife didn’t like it,because it was old. She often said. “ Give it to a poor man . ” But Mr. Jones always answered, “ No, I like this coat. ”

Then a cigarette(香烟) fell on it and made a hole in it. So Mrs Jones said, “Please don’t wear it again. ” Mr. Jones took it to a small tailor(裁缝): “ Please make another coat like this one .” The tailor made the coat very carefully. Then he lit a cigarette, and made a hole in it in the same place.

小题1: Mrs. Jones didn’t like the coat because ________ .

A.it was nice and brown

B.it was not nice

C.it was very old

D.it was not old小题2:_______ made a hole in the coat.

A.Mrs. Jones

B.Mr. Jones

C.Mr. And Mrs. Jones

D.A cigarette小题3:Mr. Jones asked the tailor to _______ .

A.make a new hole in the coat

B.make a new coat

C.make a hole in the new coat

D.make more money小题4:Who do you think was foolish(愚蠢,傻) ?

A.The tailor

B.Mr. Jones

C.Mrs. Jones

D.Nobody

题型:选择题

上海联合调查组严查染色馒头相关企业和超市,发现盛禄等公司在生产过程中虚假标注生产日期. 滥用食品添加剂、回收馒头再利用等问题。使用山梨酸钾用在馒头中防止馒头发霉,甜蜜素用在馒头中代替蔗糖,降低生产成本。则回答:  

⑴“染色”馒头中添加柠檬黄PbCrO4,铬酸铅会使人体致癌,已被明文禁用。已知铅元素化合价为+2 ,则铬元素(Cr) 的化合价为(     )

A .+6           B .+4              C .+2         D .+1  

⑵人体所必需的钙、铁、锌、硒等化学元素仅从食物中摄取不足时,可通过食品添加剂和保健药剂来予以补充,这里的“钙、铁、锌、硒”是指 ______ (选“原子”、“分子”或“元素”),其中属于人体所需的常量元素是_______ (名称)。

题型:选择题

写出两个比值是2的比组成一个比例式是______.

题型:选择题

有些胃病是由于胃酸过多引起的,治疗的药物中常含有氢氧化铝,它的作用可用下面的化学方程式表示:Al(OH)3+3HCl=AlCl3+3H2O,该反应类型属于(  )

A.化合反应

B.分解反应

C.置换反应

D.复分解反应

题型:选择题

在收缩率比试验中,以下说法不正确的有()。

A、试件养护温度为(20±2)℃

B、试件试验相对湿度为(60±5)%

C、试件的摆放方向可以不一致

D、试件养护相对湿度为(60±5)%

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