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【单选题】
中央人民广播电台中国之声的开播的是中国古曲( )的片段。A.
《高山流水》
B.
《梅花三弄》
C.
《汉宫秋月》
D.
《阳春白雪》
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【简答题】Next we have to worry about what we will ______. Frankly, I was really shocked to find out that NASA has this problem worked out. This is a scientist at ______named Michael Hecht. And he's ______this ...
【单选题】What ______ me was that there was a ______ look on her face due to the ______ problem.
A.
confuses; confusing; confusing
B.
confused; confused; confused
C.
confused; confused; confusing
D.
confused; confusing; confusing
【简答题】A study of English learning problems was carried out among a total of 106 foreign students. It shows that most students considered understanding spoken English to be their biggest problem on arrival. ...
【单选题】下列反应中，ΔrSmΘ>0 的是
A.
2 H 2 (g) ＋ O 2 (g) = 2 H 2 O(g)
B.
N 2 (s) ＋ 3 H 2 (g) = 2 NH 3 (g)
C.
NH 4 Cl(s) ＝ NH 3 (g) ＋ HCl(g)
D.
C(s) ＋ O 2 (g) = CO 2 (g)
【单选题】Watras understood he was picking up radiation at．home as_________．
A.
he always set off alarms when passing through the monitors
B.
most of his co-workers passed through the monitors without problem
C.
he proved one day he wasn’t picking up．radiation at work
D.
scientists found out his house contained radiation
【简答题】分布式人工智能系统的特点有分布性、连接性、协作性、开放性、 ________ 、独立性。
【单选题】观察和实验是学习科学的重要方式，下列实验中观察到的现象正确的是（ ）
A.
向氯化钙溶液中通入二氧化碳产生白色沉淀
B.
铁锈放入稀盐酸中溶液变黄色
C.
向氢氧化钙溶液中滴加碳酸钠溶液产生黑色沉淀
D.
硫酸铜溶液中滴加氢氧化钠溶液出现红褐色絮状沉淀
【单选题】在一个数据库中存储着若干个表,这些表之间可以通过()建立关系。 A.内容不相同字段 B.内容全部相同字段 C.第一个字段 D.最后一个字段
A.
选择1
B.
选择2
C.
选择3
D.
选择4
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