皮皮学，免费搜题
登录
搜题
【简答题】
鱼类氮代谢的终产物是氨，两栖类成体氮代谢的终产物是尿素，鸟类氮代谢的终产物主要是尿酸．在鸡的胚胎发育过程中，最早几天氮代谢的终产物是氨，过几天变成了尿素，最后以尿酸代谢为主，这说明： （1）鸡早期胚胎像______，过几天像______，最后才像______． （2）从鸡胚胎氮代谢终产物的变化可以看出高等动物是由______进化而来，进化方向是______．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【简答题】A Some British and American people like to invite friends for a meal at home. But you should not be upset if your English friends don't invite you home. It doesn't mean they don't like you! Dinner par...
查看完整题目与答案
【单选题】I wish that you _____.
A.
get a good job
B.
will get a good job
C.
would get a good job
D.
have got a good job
查看完整题目与答案
【简答题】根据句子意思，用括号中所给单词的适当形式填空。 1. It's _____ (polite) to ask a lady about her age in western countries. 2. The story _____ (it) is interesting, but it's a little difficult for children. 3. Look!  The age...
查看完整题目与答案
【单选题】在Visual FoxPro中可以建立表的命令是( )。
A.
CREATE
B.
CREATE DATABASE
C.
CREATE QUERY
D.
CREATE FORM
查看完整题目与答案
【简答题】阅读理解。 It's easy to make you embarrassed (窘迫的)-You may run into the wrong classroom and everyone looks at you. Or you have a piece of cabbage in your teeth! What do the American and British s find ...
查看完整题目与答案
【单选题】下列关于拍号说法正确的是:
A.
3 ∕ 4 拍，表示每小节有3个四分音符。
B.
3 ∕ 4 拍，表示以四分音符为一拍，每小节有3个四分音符。
C.
3 ∕ 4 拍， 表示以四分音符为一拍，每小节有3拍。
D.
3 ∕ 4 拍， 表示以四分音符为一拍，每小节有4拍。
查看完整题目与答案
【简答题】膨润土浆液的主要成分
查看完整题目与答案
【简答题】How to be a Polite Guest Some British and American people like inviting friends for a meal at home. Dinner parties usually start between 7 and 8 p.m. and end at about 11p.m. Ask your hosts what time y...
查看完整题目与答案
【判断题】It's polite to ask a foreigner about the personal privacy, such as marital status, age, salary, politics and so on.
A.
正确
B.
错误
查看完整题目与答案
【单选题】It is all right to ask someone what their job or position is, but it's not polite to ask them their salary. This is considered a ______ matter in English speaking countries.
A.
humble
B.
secret
C.
private
D.
taboo
查看完整题目与答案
相关题目：
【简答题】A Some British and American people like to invite friends for a meal at home. But you should not be upset if your English friends don't invite you home. It doesn't mean they don't like you! Dinner par...
查看完整题目与答案
【单选题】I wish that you _____.
A.
get a good job
B.
will get a good job
C.
would get a good job
D.
have got a good job
查看完整题目与答案
【简答题】根据句子意思，用括号中所给单词的适当形式填空。 1. It's _____ (polite) to ask a lady about her age in western countries. 2. The story _____ (it) is interesting, but it's a little difficult for children. 3. Look!  The age...
查看完整题目与答案
【单选题】在Visual FoxPro中可以建立表的命令是( )。
A.
CREATE
B.
CREATE DATABASE
C.
CREATE QUERY
D.
CREATE FORM
查看完整题目与答案
【简答题】阅读理解。 It's easy to make you embarrassed (窘迫的)-You may run into the wrong classroom and everyone looks at you. Or you have a piece of cabbage in your teeth! What do the American and British s find ...
查看完整题目与答案
【单选题】下列关于拍号说法正确的是:
A.
3 ∕ 4 拍，表示每小节有3个四分音符。
B.
3 ∕ 4 拍，表示以四分音符为一拍，每小节有3个四分音符。
C.
3 ∕ 4 拍， 表示以四分音符为一拍，每小节有3拍。
D.
3 ∕ 4 拍， 表示以四分音符为一拍，每小节有4拍。
查看完整题目与答案
【简答题】膨润土浆液的主要成分
查看完整题目与答案
【简答题】How to be a Polite Guest Some British and American people like inviting friends for a meal at home. Dinner parties usually start between 7 and 8 p.m. and end at about 11p.m. Ask your hosts what time y...
查看完整题目与答案
【判断题】It's polite to ask a foreigner about the personal privacy, such as marital status, age, salary, politics and so on.
A.
正确
B.
错误
查看完整题目与答案
【单选题】It is all right to ask someone what their job or position is, but it's not polite to ask them their salary. This is considered a ______ matter in English speaking countries.
A.
humble
B.
secret
C.
private
D.
taboo
查看完整题目与答案