我国伟大民族精神的核心是        、时代精神的核心是          。（   ）

读课文《窃读记》，回答“我”看到的荷花是什么样儿的？

①刚开的白荷花：

②全开的白荷花：

③将要开的花骨朵儿：

阅读下面短文，用所给动词的适当形式填空，使短文完整、通顺。每空不限一词。
     Rose is one of the funniest girls in her class. She looks like a boy, and she is good at ____ (perform). So she____ (choose) to play Harry Potter by her classmates last week. She said happily, “I'm sure that I ____ ( do )the job well because I____ (see) the movie many times already.”
    Dick, one of Rose's best classmates, is also an actor in the play. He____(like) to perform the play with Rose. He said, “We are confident that we____ (do) well in our school art festival next week.”
    Mrs. Smith, their teacher, pays much attention to their play. She often____(encourage) them. Yesterday afternoon when she ____ (watch) their performance, she took photos of them. And the photos____(send) to their headteacher next month. They hope their performance ____ (be) the best.

以v₀=10m/s速度匀速行驶的汽车，突然刹车，刹车过程中汽车以a=﹣2m/s²的加速度继续前进，则刹车后（   ）