细菌与真菌的根本区别在于：细菌细胞没有（ ） A．独立生活能力 B．成形的细胞核

该图为晨昏圈（圆心为O₁）与纬线圈（圆心为O₂，纬度度数为θ）的空间位置关系示意图，a为二圆所在平面的夹角。读图回答10～11题。

小题1:圆心O₁和O₂的连线与地轴的关系是（ ）

A．垂直

B．斜交为θ角

C．重合

D．斜交为（90°－θ）角小题2:11a的最小值是（ ）

A．0°

B．23°26′

C．46°52′

D．66°34′

用词的适当形式填空。

1. Which do you like _____ ( well ),apples, pears or bananas?

2. Is she _____ (babysit) her younger brother?

3. There are many _____ (different) between the two books.

4. You must eat more vegetables and keep _____ (health).

5. Mr Morgan finished _____ (make ) his last movie.

6. It takes me 30 minutes _____ (surf ) the Internet.

7. Why not _____ (join ) us ?

8. Now you need _____ ( put ) some sauce into the soup.

9. Susan's mother _____ ( buy) a new dictionary yesterday.

10. The little baby is too young _____ (walk).

什么叫社会现代化？

海顿所确立的管弦乐队编制为：海顿采用（）乐队；划分（）乐组（以弦乐四重奏的四个声部为基础），木管（长笛、双簧管、单簧管、大管各两支），铜管（圆号、小号各两支）三个乐器组，以及定音鼓和其他打击乐器。