夏天在农贸市场卖海鲜产品的摊位上,经常看到摊主将冰块放在新鲜的海产品上面用于保鲜,这主要是因为冰块有较低的温度和熔点,且冰在 ____ (填一物态变化名称)过程中要 ____ 热量(选填:“吸收”、“放出”).
①爷爷下棋。(在哪儿?和谁?)
②我们在教室里听课。(在什么样的教室里?怎样听?什么课?)
I w____ to Qingdao with my parents last summer holiday. We t____a plane there. We went to the beach. It was very b ____. I like swimming very much. I s____in the sea. My mum took many p____ there. We had a good time.
97前面的数是98,后面的数是96。
关节活动起来非常灵活,与之有关的结构特点是关节结构里有( )