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【简答题】
以下四人正在寻找一些网站, 阅读以下五段不同网站的介绍(A、B、C、D、和E),对出正确答案,并在答题纸上将该选项标号涂黑。A、B、C、D、和E选项中有一多余选项。 1. Jasper enjoys listening to music. He is expecting to find a website where he could search for various songs with similar tunes that he prefers. 2. Luke is planning to buy a car. But right now he has not made up his mind. He prefers Mazda RX-8. He wants to find more information about this car to make sure that it is a good choice. 3. This Sunday is Valentine’s Day. Roderick is still deciding what kind of presents he should buy for his girlfriend. He prefers to have something traditional, like chocolate. 4. Fiona is retired. She begins to pay attention t o her health. What interests her most now is how to remain healthy and young. She always surfs on the internet for such information. A. Naturespath.com is an excellent health-food website. “Life enhancement expert” Allan Hunkin interviews such guests as nutrition expert Dr. David Katz and tri-athlete Melanie McQuaid. They talk up health food and weight management, including debates on the benefits of whole grain and organics. B. Autoblog.com tops the category by covering “auto industry news from A to Z.” They discuss hundreds of car models and links to outside articles for more information. While the site provides no reliability reviews, its “royal and growing fan base” comments frequently on the entires. C. Mrchocolate.com—The Consumer Reports “best buy” for “unusual” chocolates for the one you love. Jason’s choice is 50 pieces of small dark, milk, and white chocolate with offbeat (标新立异的) centers, including coffee, nut butter, and tropical fruit. D. Carpet-rug.org— The Carpet and Rug Institute awards a “Green Label” to vacuums (真空吸尘器) that release fewer than 100 micrograms of dust particles per cubic meter of air. Find a list at this site. E. Pandora.com takes one of your favorite tunes, then suggests songs that you might enjoy. Pandora offers 10 hours of free use, then charges $ 36 a year.
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【简答题】在 FeCl 3 溶液中 , 加入 KI 溶液 , 有 I 2 生成 , 在溶液中加入足量 NaF 后 , 溶液中的 I 2 消失。其原因为?
【简答题】在FeCl3溶液中加入足量的NaF后,再加入KI溶液时,________________I2生成(填写有、无或无法确定),这是由于________________。
【单选题】向2mL 0.5mol/L的FeCl 3 溶液中加入3mL 3mol/L KF溶液,FeCl 3 溶液褪成无色,再加入KI溶液和CCl 4 振荡后静置,CCl 4 层不显色,则下列说法正确的是(   )
A.
Fe 3 + 不与I - 发生反应
B.
Fe 3 + 与F - 结合成不与I - 反应的物质
C.
F - 使I - 的还原性减弱
D.
Fe 3 + 被F - 还原为Fe 2 + ,使溶液中不再存在Fe 3 +
【简答题】在FeCl 3 溶液中加入足量的NaF后,再加入KI溶液时,______I 2 生成(填写有、无或无法确定),这是由于______。
【单选题】向2mL 、0.5mol/L的FeCl 3 溶液中加入3mL 、3mol/L KF溶液,结果FeCl 3 溶液褪成无色,向褪色后的溶液中继续加入KI溶液和CCl 4 振荡后静置,CCl 4 层不显色,则下列说法正确的是(   )
A.
Fe 3 + 不与I - 发生反应
B.
Fe 3 + 与F - 结合成不与I - 反应的物质
C.
F - 使I - 的还原性减弱,因而不反应
D.
Fe 3 + 被F - 还原为Fe 2 + ,使溶液中不再存在Fe 3 +
【简答题】在FeCl 3 溶液中加入足量的NaF后,又加入KI溶液时,_I 2 生成,这是由于_。
【多选题】皮肤黏膜屏障的组成包括
A.
血胎屏障
B.
物理屏障
C.
化学屏障
D.
血脑屏障
【单选题】进入新时代,进一步推动军民融合深度发展,更需要坚持
A.
国家主导
B.
市场运作
C.
军地协调
D.
资源共享
【单选题】进入新时代,进一步推动军民融合深度发展,更需要坚持 ( )
A.
国家主导
B.
资源共享
C.
市场运作
D.
军地协调
【单选题】进入新时代,进一步推动军民融合深度发展,更需要坚持 ( )
A.
军地协调
B.
市场运作
C.
国家主导
D.
资源共享
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