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【简答题】
We tend to think of humans as the only creatures with organized societies in which each individual has or may have a particular role. However, there are other creatures, for example, insects such as ants, that like us, have complex societies. Ants are particularly interesting as they can be found in almost every part of the planet apart from Anarctica. The key to their success as a species is their social organization. Like humans, ants have division of labour. They live in colonies that range from about twenty five to millions of individuals. Each ant colony has one or more queens whose job is to lay eggs. These eggs are looked after by worker ants, which also perform other tasks such as searching for food, and building and defending nests. So clean and tidy are ants that some worker ants even have the task of taking rubbish from the nest. Ants have some fascinating physical features. They have two compound eyes-----each eye is made of many smaller eyes which increases how far they can see----and two stomachs, one of which holds the food for the ant, and a second which holds food to be shared with other ants. They can run extremely fast and are able to lift twenty times their own bodyweight, which is why one may see an ant carrying a piece of food many times its size. Ants use chemicals called pheromones to communicate with each other and leave pheromone trails to guide other ants to food. There are over 10,000 species of ants. Among them are slave-maker ants that steal ant eggs from other colonies, and when these hatch, make the new ants work as slaves. Leaf-cutter ants cut and take back pieces of leaves to their nests, then grow a fungus on these leaves that is used as food. Army ants are always on the move and carry their eggs with them. Perhaps now, after learning a little about these fascinating creatures, when you next look at an ant, you will see it with different eyes. 1、The passage says that ants are similar to human beings because _____. A. each ant has many roles B. they exist in every part of the planet C. they are very successful D. they have societies which are organized
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【简答题】The shopkeeper offered him the ______ (good)hat in the shop with the ______ (low)price.
【判断题】005mol/L的H2SO4溶液pH值为2
A.
正确
B.
错误
【单选题】2017年7月8日,( )在波兰克拉科夫举行的世界遗产大会上获准列入世界文化遗产名录。至此,中国已拥有52处世界遗产。
A.
海南省永暑礁
B.
福建省鼓浪屿
C.
上海市崇明岛
D.
广东省大亚湾
【单选题】对水准仪的i角进行检验,测得i角为负值,则说明视准轴向(   )方向偏?
A.
向上
B.
向下
C.
向左
D.
向右
【简答题】求室温条件下0.005mol/l的 H 2 SO 4 溶液的PH值
【多选题】根据《邮政法》,为维护用户用邮权益,邮政企业、快递企业应当遵守的服务规范主要涉及______。
A.
邮件的投交方式和投递时限
B.
给据邮件和邮政编码的查询服务
C.
邮政专用标志的使用规范
D.
快递业务经营许可证的申请
E.
格式条款的规范使用
【单选题】当地时间2017年7月8日,在波兰历史文化名城克拉科夫举行的联合国教科文组织世界遗产委员会第41届会议上,又一项中国世界文化遗产提名项目成功列入《世界遗产名录》。它是______。
A.
“鼓浪屿:历史国际社区”
B.
甘肃敦煌莫高窟
C.
开平碉楼与古村落
D.
红河哈尼梯田文化景观
【简答题】A -------- original office B -------- accepted date C -------- posting stamp D -------- delivery stamp E -------- company name F -------- sender’s address G -------- customer code H -------- document ...
【简答题】某个信封上邮政编码M和N均由0,1,2,3,5,6这六个不同数字组成,现有4个编码如下: A、320651    B、105263    C、612305    D、316250 已知编码A、B、C、D各恰有两个数字的位置与M和N相同,D恰有三个数字的位置与M和N相同,试求M和N.
【简答题】005mol/L的H 2 SO 4 溶液的pH= 。
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