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【单选题】
化学与生产、生活、社会密切相关。下列有关说法中正确的 A .红宝石、珍珠、玛瑙、水晶、钻石等装饰品的主要成分都是硅酸盐 B .从海带中提取碘单质的过程涉及氧化还原反应 C .广泛应用于太阳能电池、计算机芯片和光导纤维 D .我国大部分城市禁放烟花爆竹, 绚丽缤纷的烟花中添加了含钾、钠、钙、铜等金属元素的化合物,因发生化学反应而看到绚丽多彩的现象A.
B.
C.
D.
D
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【单选题】The author decided to bring Charlie home _______.
A.
when she heard him crying out loudly
B.
when she first saw him and his evil-looking owner
C.
because she was impressed by his persevering spirit of fighting
D.
after the bird said "okay" to her
【单选题】Not only _____________ vital for reducing fever, but __________ also other things that it can help with.
A.
aspirin has proved, are there
B.
has aspirin proved, there are
C.
has proved aspirin, are there
D.
aspirin had proved, there are
【简答题】Computers can help many workers. They can also help thieves. There was one thief who worked in a bank of the United States. He paid for everything he needed by check (支票). Then he told the computer no...
【多选题】下列对德国的叙述中,正确的是( )。
A.
德国国花是矢车菊
B.
科隆大教堂有两座哥特式尖塔，是目前世界上最高的双塔教堂。
C.
德国人忌讳“13”，最不吉利的是“13日星期五”。
D.
德国人不喜欢红色，红黑相间色以及褐色，尤其是忌讳墨绿色。
E.
德国人接受礼物时不能当着送礼者的面打开礼物
【判断题】CSR can also help improve the perception of a company among its staff, particularly when staff can become involved through payroll giving, fund-raising activities or community volunteering.
A.
正确
B.
错误
【单选题】The author first saw the blind man _________.
A.
after coming down from the tower
B.
after getting a ticket from the attendant
C.
when he was about to start his climb up the tower
D.
when he was half way up to the top of the tower
【判断题】The first time the author saw Pretty Girl was when the author's mother and brother brought Pretty Girl home.
A.
正确
B.
错误
【判断题】CSR can also help improve the perception of a company among its staff, particularly when staff can become involved through payroll giving, fund-raising activities or community volunteering.
A.
正确
B.
错误
【多选题】下列叙述中正确的是
A.
金属被锻压成薄片、抽拉成细丝，金属的晶体结构就被破坏了
B.
硫酸亚铁晶体是淡绿色晶体，又称绿矾
C.
联合制碱新工艺是由我国科学家候德榜创造性设计出来的
D.
在食品工业上，碳酸氢钠是发酵粉的主要成分之一
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