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三.阅读 A篇 (每题2分) A During the winter holiday season, we often see an increase in the amount of rubbish we produce in our homes. As you prepare to celebrate the holidays, follow the simple instructions in this article to help cut the amount of rubbish produced in your home. For gift-giving: ◆ Homemade gifts, such as cards, often produce less rubbish and can be a treasure to receive. This is a great idea for children to try. When wrapping ( 包装 ) gifts: ◆ Use gift bags instead of wrapping paper. Gift bags are reusable and not as likely to go out with the rubbish. If you receive gifts in gift bags, be sure to store them away for future use. When entertaining: ◆ Avoid the use of plastic forks, spoons and knives as much as possible. Bring out your favorite dishes for special holidays, and buy a holiday tablecloth to avoid using disposable ( 一次性的 ) paper or plastic ones. After the holidays: ◆ Store your reusable decorations until next year. ◆ Sort out and store reusable gift bags and gift wrap. By making a few simple changes in our holiday habits, we can cut the amount of rubbish we produce between Thanksgiving and New Year's Day. And remember to continue these habits year round for a better environment for today and tomorrow's world. 23. To have less rubbish, children can __________ as a gift. A. give a homemade cardB. send some disposable paper C. choose a plastic knifeD. buy an expensive toy car 24. It's better for us to store gift bags because ______________ . A. they are beautifulB. they are large enough C. we can reuse themD. we can wrap gifts easily 25. The writer advises us to _____________ . A. hold some parties during the winter holiday B. keep the gifts for next year after the holiday C. buy cheap gifts for our friends on New Year's Day D. make small changes to reduce the amount of rubbish
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【单选题】下列各组离子在指定溶液中能大量共存的是 [     ] ①无色溶液中:K + 、Cu 2+ 、Na + 、SO 4 2- ②pH=11的溶液中:CO 3 2- 、Na + 、AlO 2 - 、NO 3 - ③加入Al能放出H 2 的溶液中:Cl - 、HCO 3 - 、NO 3 - 、NH 4 + ④在由水电离出的c(OH - )=10 -13 mol·L -1 的溶液中:Na + 、Ba 2+ ...
A.
①②⑤
B.
③⑤⑥
C.
②④
D.
②④⑥
【单选题】下列离子在水溶液中不稳定的是( )。
A.
Cu +
B.
Cu 2 +
C.
Hg +
D.
Hg 2 2+
【单选题】His failure made his father think him a ___________ boy.
A.
disappoint
B.
disappointed
C.
disappointing
D.
disappointment
【判断题】海运提单的签发日期是指货物开始装船的日期
A.
正确
B.
错误
【判断题】医学上将5%的葡萄糖溶液成为等渗溶液,这是因为它与尿的渗透压相等。
A.
正确
B.
错误
【单选题】在下列各溶液中,离子可能大量共存的是(  )
A.
无色溶液中:Al 3+ 、Na + 、SO 4 2- 、AlO 2 -
B.
澄清透明的溶液中:Cu 2+ 、Fe 3+ 、NO 3 - 、Cl -
C.
含有大量ClO - 的溶液中:K + 、H + 、I - 、SO 3 2-
D.
水电离产生的c(H + )=10 -12 mol?L -1 的溶液中:Na + 、Fe 2+ 、SO 4 2- 、NO 3 -
【多选题】乌梢蛇的鉴别特征有( )。
A.
全体绿黑或黑褐色
B.
背鳞行数为奇数
C.
背鳞2~4强烈起棱,形成纵贯全身的黑线
D.
具“剑脊”
E.
具较大的1对毒牙
【判断题】海运提单的签发日期是指货物开始装船的日期。 ( )
A.
正确
B.
错误
【判断题】海运提单的签发日期是指货物开始装船的日期
A.
正确
B.
错误
【单选题】下列各组离子在指定溶液中能大量共存的是
A.
在无色溶液中:Na + 、Cu 2+ 、NO 3 ― 、MnO 4 ―
B.
在含有HCO 3 - 的溶液中:H + 、K + 、SO 4 2― 、Cl ―
C.
能使酚酞变红的溶液中:Al 3+ 、Fe 3+ 、NO 3 - 、SO 4 2-
D.
常温下,水电离的 c (H + )=10 - 12 mol·L ―1 的溶液中:K + 、Ba 2+ 、NO 3 ― 、Cl ―
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