如图所示,当S1、S2断开时,能亮的灯是____ ,它们是串联的;当S1、S2闭合时,能亮的灯是____ ,它们是并联的;当S1闭合,S2断开时,能亮的灯是____
根据短文内容,用方框中所给词的适当形式填空。
but, favorite, want, about, hamburger, and, like, often, I, visit
Dear Han Mei,
Thank you for your letter. I ____ China very much. And I ____ to go to China with my parents. We want ____ Beijing. I know something ____ China from your letters. ____. I don't know much about Chinese food. Could you tell ____ something about it?I like ____ and fish very much. You tell me you ____ eat rice, vegetables and chicken. And your ____ food is jioazi. What kind of food ____ drink can I have in China? Please tell me.
“正是这个设计……使这个稚嫩的国家在草莽中崛起,迅速成为也许你不喜欢但却不能轻视的超级大国。这样一个精巧的设计,在二百年前由一群蛮荒大陆上的“乡巴佬”创造出来,实在令人惊叹不已。”材料中的精巧设计是指( )
X
Y
Z
A
置换反应
氧化还原反应
离子反应
B
铜
单质
非电解质
C
石灰水
电解质
分散系
D
液氨
化合物
纯净物