下图为我国西北某地等高线和等压线分布图，图中天气系统移动速度为120km／天，回答下列问题
根据图示信息，说法正确的是
| A．地形以高原丘陵为主 |
| B．河流径流量小，季节变化大、年际变化小 |
| C．图中山峰和城市的相对高差为900—1000米 |
| D．图中河流流向是自东北流向西南 |
图中城市24—36小时后的风向及天气状况为
| A．偏南风雨雪、降温 |
| B．偏南风气压降低、天气晴朗 |
| C．偏北风雨雪、降温 |
| D．偏北风气压降低、天气晴朗 |
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 |
The most important _____ of his speech at the G20 summit was that we should all unite to fight against the finanical.
| A．element | B．spot | C．view | D．point |