1958年9月,全国范围内掀起了人民公社化运动。人民公社的基本特点是()。
A.政社合一
B.一大二公
C.一平二调
D.平均分配
参考答案:A
阅读短文,选择正确答案。
My name is Lily. I'm from Canada. I speak English in Canada. My friend Jenny lives in Ottawa. It's the
capital city of Canada. I like the flag of Canada. It's beautiful. It's red and white. It has a leaf! I also like Niagara
Falls! It's a famous waterfall in Canada. Do you like Canada? Welcome to Canada in the summer holidays!
1. Where is Lily from?[ ]
A. China.
B. Canada
C. The U. K.
2. Where does Jenny live?
B. Canada.
3. What language (语言) does Lily speak? [ ]
A. Chinese.
B. French.
C. English.
4. Does Lily like Niagara Falls?[ ]
A. Yes, she does.
B. No, she doesn't.
C. Yes, she doesn't.
5. Is Niagara Falls famous?[ ]
A. Yes, it is.
B. No, it isn't.
C. We don't know.
小勇在探究“阻力对物体运动影响”的实验时,利用如图所示的装置图。
⑴小勇每次都让小车从同一斜面的___________(填“相同”或“不同”)位置由静止开始滑下,是为了使小车在滑到底端时具有相同的速度。
⑵减小图中水平面的粗糙程度,比较小车在不同表面滑行的最大距离,可以得出:在初速度相同的条件下,水平面越光滑,小车受到的摩擦力越___________,小车运动的距离越___________。
⑶进一步推理可知,若水平面绝对光滑,则小车会在水平面上做___________运动。
⑷运用以上推论可知:若用绳子拴着一金属小球,使小球做圆周运动,当小球受到的力突然全部消失时,小球将_________________
A.做匀速直线运动
B.立即停止运动
C.继续做圆周运动
D.减速运动直到停止