下列物质中能与澄清的石灰水反应，但反应若不加指示剂则无明显现象的是

— Do you climb mountains every day?

—Yes, ________ a little exercise. I'm so out of shape.

 - Happy Father's Day.- Thank you, dear.

看图读一读，把A、B、C、D填入相应的横线上。

A. It is winter. It is cold. We can make a snowman(雪人).

B. It is spring. Itis warm. We can ride bicycle in the park.

C. It is autumn. It is cool and windy. We can fly kites in the park.

D. It is summer. It is hot. We can swim in the sea.

____质地松软，吸水力强，适合于水墨书写、绘画和印刷用，如中国的宣纸。