A:—Do you play football on Monday?—No, I don't .I go shopping.
B:—Do you play football on Monday?—No, I don't .I go swimming.
实验表明太阳光也有一定的光照压强,其正对太阳光的压强为9×10﹣4Pa,现已知安徽最大的淡水湖巢湖的表面积约为7.7×108m2,则该淡水湖受到光的压力____ N.
Hello! I'm Linda. I have a good e-friend. Her name is Zhang Yun. Her English name is Betty. She is a Chinese girl, but she lives in the UK with her parents. Her father is a doctor and her mother is a teacher. She is ten years old. She call me big sister. She is good at English. She likes Chinese and I also like Chinese. She likes singing and playing basketball. This is my good e-friend. Do you want to know more?
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下列操作既能加快硝酸钾的溶解速度,又能增加硝酸钾溶解质量的是( )