四年级下册下课时练习(一课一练含答案)第一单元-6 飞向蓝天的恐龙课时练
6飞向蓝天的恐龙课时练第一课时一、写出加点词语的近义词。 1.恐龙的一支经过漫长的演化。() 2.顿时全世界的研究者欣喜若狂。() 3.有些恐龙动作敏捷。() 4.它的后代繁衍成了一个形态各异的庞大家族。() 二、在括号里填上合适的词语。 ()的霸王龙 ()的马门溪龙 ()的鸽子 ()的孔雀 ()的演化 ()的鸟儿 三、根据意思写词语。 1.指反应迟缓;脑子不灵敏。() 2.立刻、一下子。() 3.反应迅速快捷。() 4.形容高兴到了极点。()【答案】一、1.(演变)2.(欢欣鼓舞)3.(灵敏)4.(巨大)二、(凶猛) (迟钝) (轻盈) (五彩斑斓) (漫长) ...
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