在装修房屋时,工人师傅常用一根足够长的透明塑料软管,里面灌入适量的水(水中无气泡),两人各持管的一端靠在墙面的不同地方,当水静止时,在与水面相平的位置做出标记.这样做利用了____原理,目的是保证两点在____. 著名的____实验首先证明了大气压的存在;____实验首先测量出了大气压强的值.1标准大气压=____ Pa.
观察如图,回答问题:
A. Look at the duck. It is short and fat.
B. The pig has a fat body and big ears.
C. Look! They're Lucy and Lily. T Lucy is from Australia. Lily is from Canada.
D. Mr White is my teacher. He's from the USA.
E. This is Amy, She's my sister. She's a pupil.
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