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【简答题】
下列物质中哪些可以用直接法配制成标准溶液?哪些只能用间接法配制成标准溶液? H 2 C 2 O 4 ·2H 2 O 、 KOH 、 KMnO 4 、 K 2 Cr 2 O 7 、 KBrO 3 、 Na 2 S 2 O 3 ·5H 2 O 。
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【单选题】Yeats was beginning to use a vocabulary freshly minted from the treasury of Gaelic literature, and many of the shorter poems in The Countess Kathleen and Various Legends and Lyrics (1892) deal with a ...
A.
Greek mythology
B.
the Arthurian legend
C.
Gaelic allusions
D.
the story of Fergus and Conchubar
【单选题】下列对生铁和钢的各项叙述中，正确的是（ ）
A.
生铁和钢都不是铁的合金
B.
生铁的含量一定比钢高
C.
钢的性能优于生铁，所以钢有着比生铁更广泛的用途
D.
生铁不是纯铁，而钢是纯铁
【单选题】In order for you to follow the schedule set by the publisher, your paper must be looked over over the weekend, revised, and handed in in its final form on Monday. What must you do on Saturday and Sund...
A.
meet the publisher
B.
examine your paper
C.
hand in a paper
D.
look over the weekend
【单选题】So far the gardeners ______ no instructions as to what to do next.
A.
have received
B.
have accepted
C.
have revised
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