航行在沿海和江湖上的客轮大小不等，船上的设备差异很大。大型客轮的舱室一般分为( )

地球是人类的家园。地壳里各种元素的含量差别很大，按质量计，含量最多的元素是[ ]

A.铝

B.硅

C.氧

D.铁

某房地产开发企业销售房地产的收入为3000万元，扣除项目金额为1500万元，则应缴土地增值税为( )万元。

A．450

B．525

C．600

D．900

小题1:I like chocolate very much because I have a sweet t________________.

小题2:If we break the traffic rules, we may be d_____________________.

小题3: Jane is very glad to r___________________ a letter from her pen pal.

小题4:In _____________ (south/southern) part of China, people eat a lot of rice.

小题5: Maria arrived ___________ (early/earlier) than me.

小题6: Armstrong is the greatest cyclist, but his way to _________ (success/successful) wasn’t smooth.

小题7:Shall we sell flowers to _____________ (筹集) money for the picnic?

小题8:Beijing Opera is an important part of Chinese ___________________ (文化).

小题9:We should work harder to make our dreams __________ __________ (变为现实)

“四个服从”中，最重要的是什么？