关于聚落空间形态的叙述，正确的是
| A．受城市规划影响，城市空间形态与所处地理环境关系不大 |
| B．华北平原的乡村一般规模较小 |
| C．聚落的空间形态往往沿交通干线扩展 |
| D．沿河谷发展的城市，城市空间形态往往形成同心圆状 |
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 |
It has always been the _____ of our goverment to encourage graduates to start their business.
| A．plan | B．campaign | C．procedure | D．policy |