--- This sweater is too small. Would you mind giving me a bigger one?
--- . Here you are.
A:I disagree
B:Good idea
C:Thanks a lot
D:Not at all
①他将小球用一根细线悬挂起来,如图(a)所示,剪断细线后小球落下,如图(b)所示。
②他又将小球用两根细线悬挂起来,如图(c)所示,剪断其中的一根细线,小球发生摆动,如图(d)所示。通过实验,他的疑问得到解决根据实验现象及相关条件,小明同学归纳得出的初步结论:(选填下面对应的结论字母)
运用知识解决问题:
(1)人工降雨和舞台的白雾都是固态的干冰迅速 ____,从周围空气中 ____大量的热,使空气温度急剧下降,空气中的水蒸气遇冷凝结下落,变成水滴就成了雨.
(2)冬天手冷时,用嘴向手上“哈气”,手感到暖和
答:向手“哈气”时,嘴中呼出的 ____遇到手发生了 ____现象, ____热量,所以感到暖和.
(3)如图温度计的读数分别是多少?
(a)温度计: ____;(b)温度计: ____
Now boys and girls, I have got something to t____ you. Tomorrow is Friday. We are going to have our O____ Day. Our parents will come to school and v____ our school. They will a____ at three t____. They will s____ in the classroom and listen to our teachers. Then they will go to the p____ to see our wonderful show.