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【简答题】
I’ll never forget ________ you for the first time. A) to meet B) meeting C) to have met D) having to be meeting
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【简答题】( )把被测试对象看成一个黑盒子,测试人员完全不考虑程序的内部结构和处理过程,只在软件的接口处进行测试。
【单选题】The 5 paragraphs attached here are taken from the reading passage. Which paragraph contains the following information? You may not choose the same paragraph more than once. Reading for main ideas.pdf ...
A.
Paragraph 11
B.
Paragraph 12
C.
Paragraph 13
D.
Paragraph 14
E.
Paragraph 15
【单选题】Which of the following sentences expresses a fact? A. Mary and her son must be home by now. B. Careless reading must give poor results. C. It’s getting late, and I must leave now. D. He must be workin...
A.
选择1
B.
选择2
C.
选择3
D.
选择4
【简答题】已知 K sp ( MgF 2 ) = 6.5 × 10 -9 ,将10.0 mL 0.245 mol / L Mg(NO 3 ) 2 溶液与25.0 mL 0.196 mol / L NaF溶液混合,是否有MgF 2 沉淀生成 。
【单选题】While reading the newspaper, ________.
A.
a colorful ad caught my eyes
B.
my attention was attracted by an ad
C.
I was attracted by a colorful ad
D.
what attracted me was a colorful ad
【单选题】将2×10【图片】mol·L【图片】 NaF溶液与2×10【图片】mol·L【图片】 Fe【图片】溶液等体积混合, 并调pH为1.0。此时铁的主要存在形式是（ ）。[已知Fe-F络合物的lgβ1-lgβ3分别是5.3, 9.3, 12.1, pKa(HF)=3.2]
A.
Fe
B.
FeF
C.
D.
【单选题】After a short rest, he came back to he had stopped and continued reading.A．whereB．whichC．in which
A.
14．After a short rest, he came back to he had stopped and continued reading. A．where
B.
which
C.
in which
D.
that
【单选题】将2×10 -2 mol·L -1 NaF溶液与2×10 -4 mol·L -1 Fe 3+ 溶液等体积混合, 并调pH为1.0。此时铁的主要存在形式是( )。[已知Fe-F络合物的lgβ 1 -lgβ 3 分别是5.3, 9.3, 12.1, p K a (HF)=3.2]
A.
Fe 3+
B.
FeF 2+
C.
FeF 3
D.
Fe
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