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【判断题】
已知反应 2A→P 为零级反应, A 的半衰期为 30min ,由此可知, A 消耗 3/4 所需时间为 45min 。( )A.
正确
B.
错误
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【单选题】— Peter jumps _____ than any other boy in our school. — I'm sure he will be the winner in the high jump. [ ]
A.
higher
B.
longer
C.
faster
D.
farther
【单选题】Section B Directions: This section is to test your ability to understand short conversations. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. The ...
A.
His mother-in-law's.
B.
A place by the sea.
C.
Country.
D.
Noisy places.
【简答题】Always wanted to meet Tinker Bell? Then you may want to head over to Rossendale Valley in Lancashire, England, where you will encounter not one, but numerous versions of the fairy that first made her ...
【单选题】市场上有种灯具俗称 “ 冷光灯 ” ,用它照射物品时能使被照物品处产生的热效应大大降低,从而广泛地应用于博物馆,商店等处,这种灯降低热效应的原因之一是在灯泡后面放置的反光镜玻璃表面上镀了一层薄膜 ( 例如氟化镁 ) ,这种膜能消除不镀膜时玻璃表面反射回来的热效应最显著的红外线。 以 λ 表示此红外线的波长,则所镀薄膜的厚度最小应为( )
A.
. λ/8
B.
λ/4
C.
λ/2
D.
λ
【简答题】Read the following dialogues and take telephone messages. (J = Jim; G = Gerald Rivers) J: Hello, Gerald. It’s Jim. Is Peter there? G: I’m sorry, Jim. He’s just left the office. J: What time will he be...
【简答题】现代服装业企业以()为核心发展。
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