中 * * 党和各民主党派合作的首要前提和根本保证是（）。 A.遵守宪法和法律 B.坚持

螺旋钻最适合钻进的土层为：

A.粘性土

B.砂土

C.碎石土

D.岩石

婴儿期常见的惊厥病因有（）

A.低血钙

B.化脓性脑膜炎

C.高热惊厥

D.婴儿痉挛症

E.颅内感染

句型转换，每空一词。

1. They had an English party last Sunday. (改为否定句)

    They _______ _______ an English party last Sunday.

2. The reporter asked the girl,"Do you like your volunteer work on weekends?" (改为间接引语)

    The reporter asked the girl _______ she _______ her volunteer work on weekends.

3. The girl with a flower in her hand is my sister. (改为含定语从句的复合句)

    The girl _______ _______ a flower in her hand is my sister.

4. Should I arrive on time or a little later if someone invites me to dinner? (改为同义句)

    Am I _______ _______ arrive on time or a little later if someone invites me to dinner?

5. The students will learn the group dance on the school playground. (对画线部分提问)

    _______ _______ the students learn the group dance?

什么是正确的逃生方法？

一般日用商品适合采用直接分销渠道。