1.我国的科学家在辽宁西部发现了羽毛印痕的恐龙化石。(缩句)
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2.老松树黄色的泪珠淹没了两只小虫。(改写成“被”字句和“把”字句)
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3.恐龙是如何飞向蓝天的呢(____)让我们穿越时空隧道(____)访问中生代的地球(____)看看这一演化过程吧(____)(给句子加上标点符号)
4.任凭谁怎么呼唤,它也不肯回来。(用加点词造句)
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同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2