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【简答题】
共产主义社会的显著特征是——。
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【简答题】近年来，福寿螺在一些地区迅速扩散蔓延，使当地的生物多样性面临威胁。请根据材料回答： （1）福寿螺生活在淡水中，身体柔软，靠贝壳来保护身体。从分类上来分析，福寿螺属于_____动物。 （2）福寿螺食性广泛，各种植物都能被其取食，尤其对水稻危害极大。有的地方，农田插秧后不到几天，秧苗就被福寿螺吃个。从生态系统的组成成分来分析，福寿螺属于 。 （3）福寿螺原产于南美洲亚马孙河流域，1981年开始引入...
【单选题】The bell________the end of the period rang, ________our heated discussion. [ ]
A.
indicating; interrupting
B.
indicated; interrupting
C.
indicating; interrupted
D.
indicated; interrupted
【单选题】If I _______ foreign language last year, I would have taken it.
A.
have been fond of
B.
was fond of
C.
were fond of
D.
had been fond of
【简答题】My name is Carl Kennedy and I’m an English teacher. I really like my job. I feel very glad when my students feel comfortable speaking English. But I have to admit that sometimes I feel a little enviou...
【单选题】If only I ____ several foreign languages.
A.
could speak
B.
can speak
C.
speak
D.
will speak
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