正确答案: C

人类

题目：在漫长的地质历史演变过程中，最晚出现的是( )

解析：

 

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学习资料的答案和解析：

[单选题]音乐会上不同的乐器演奏同一首乐曲，我们也能够分辨出不同乐器发出的声音．这主要是依据

音色

[单选题]Today is (11) 15． It’s Marie-s birthday．(12) friends (13) here．They are Linda， Tom， Peter，John， and Lucy． Her (14) are here， too． There(15) a big cake on the table．There are fourteen candles (16) the cake． There (17) also salad， ham-burgers， fish， eggs，and vegetables on the table． Marie is very happy．They (18) the song Happy Birthday to Marie． Marie gets (19) gifts (20) her friends． She is very happy．( )11．

October

解析：．11．A【解析】选A。月份的首字母应大写。

[单选题]AHello，everyone! It's that time of year again! Hualin's fantastic sale! You name it， and we have it at a very good price． Do you like them at low prices? We have sweat-ers in all colors at 50 yuan each! Do you need a bag for sports or school? We have great .bags for just 6 yuan! For young boys and girls， we have T-shirts in red， green，yellow， orange， blue and black for only 15 yuan! And socks in all colors for just 1yuan! And that-s not all． Can-t you believe it? Come down to Hualin and see by your-self!

an advertisement(广告)

解析：21．B【解析】根据文章整体内容推断是一则广告，所以选B项．

[单选题]AIn a small village， there is a teacher， a nurse(护士) ，a driver(司机) and a worker．They are good friends． What are their names? One is Mike， one is Jack， one is Tom and the other is John． Mike's， Jack’s and Tom-s children are classmates． John doesn’t have any children He teaches his friends' children at school． Mike has many hens． He gives the driver and the nurse eggs． Jack's child goes to the nurse- s house． The nurse-s house is beside Jack's．

Yes．

解析：21．A【解析】根据文章的第二句可知。