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【简答题】
People tend to ignore the delayed effects of exposure to chemical because ________. A) limited exposure to them does little harm to people’s health B) the present is more important for them than the future C) the danger does not become apparent immediately D) humans are capable of withstanding small amounts of poisoning
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举一反三
【单选题】水泥的初凝时间为不宜过短，终凝时间不宜过长。按国标《通用硅酸盐水泥》（GB175-2007）规定，矿渣水泥凝结时间分别为，初凝时间为（ ）分钟，终凝时间为（ ）分钟。
A.
初凝≧45；终凝≦390；
B.
初凝≧45；终凝≦600；
C.
初凝≦45；终凝≧390
D.
初凝≦45；终凝≧600；
【简答题】纳税人享受减税、免税待遇的，在减税、免税期间不需办理纳税申报。（ ）
【单选题】听力原文：M: Hello, Jane, I'm wondering if you'd like to join us for disco this evening. W: Oh, I wish I could, but I still have a paper to discuss with Profess Smith this evening. M: Oh, it's a pity! Then...
A.
Go to disco.
B.
Write her paper.
C.
Visit a professor.
D.
Join a party.
【单选题】PNX系列铁路信号智能电源屏过压阀值的调整范围为( ): ( U为输入电源的电压值)
A.
0.6U～0.9U
B.
1.1U～1.2U
C.
0.6U～0.8U
D.
1.1U～1.3U
【单选题】听力原文：W: Hello. Slimming Club. Can I help you? M: Yes. How much does it cost to join? W: ＄1 225 a year for a single membership, and ＄ 1 270 for a family membership. How much will it cost the man and on...
A.
＄ 225.
B.
＄ 270.
C.
＄ 450.
D.
$495.00
【单选题】听力原文：W: Hello. Slimming Club. Can I help you? M: Yes. How much does it cost to join? W: $ 1 225 a year for a single membership, and $ 1 270 for a family membership. How much will it cost the man to jo...
A.
$ 1225.
B.
$ 270.
C.
$ 450.
D.
$495.00
【单选题】听力原文：W: Hello. Slimming Club. Can I help you? M: Yes. How much does it cost to join? W: ＄ 1 225 a year for a single membership, and ＄ 1 270 for a family membership. How much will it cost the man and o...
A.
＄ 225.
B.
＄ 270.
C.
$450.00
D.
$495.00
【单选题】PNX系列铁路信号智能电源屏过压阀值的调整范围为( )(U为输入电源的电压值)。
A.
0.5U~0.8U
B.
0..8U~1U
C.
1.0U~1.5U
D.
1.1U~1.3U
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