2014年末，北京人口数为2151万。2015年3月，北京公布了“严控人口数量”的新目标：2020年人口数量控制在2300万以内，该人口数量主要是根据北京水资源的承载力计算出来的。据资料，回答下题。2020年的人口数量是北京的
| A．户籍人口数量 | B．外来人口数量 |
| C．人口合理容量 | D．环境人口容量 |
北京市为控制人口规模需要调整的产业为
①普通服装业 ②高新技术产业 ③文化创意产业 ④小商品批发产业
| A．①② | B．①④ | C．②③ | D．③④ |
----What do you know the _____ of are the pig influenza in humans?
---- usually similar to regular human seasonal influenza .
| A．symptoms | B．sympathy | C．symbol | D．symptom |
People go out with masks,________.
| A．fear of swine flu. | B．afraid of swine flu. |
| C．fearing of the pig flu. | D．being afraid of swine flu.. |
The dead rate is _____ pigs and recovery usually ______ within 7-10 days.
A low in; occursB.rich in;happens
C.high in; came aboutD.poor in;took place
_____ three influenza type A virus subtypes(子类型) have been found in pigs.
| A．By far | B．As far as | C．So far | D．Till far |
_____, experts point out that students can easily fail at starting their business because of a lack of preparations.
| A．But | B．However | C．while | D．though |