下表反映了20世纪50年代以来科尔沁沙地重心移动的情况。据此回答小题。
| 年份(年) |
东经 |
北纬 |
| 1949 |
121.97° |
43.57° |
| 1955 |
121.93° |
43.51° |
| 1960 |
121.94° |
43.54° |
| 1970 |
121.88° |
43.59° |
| 1978 |
121.86° |
43.63° |
| 1985 |
121.75° |
43.80° |
| 1990 |
121.80° |
43.68° |
| 1995 |
121.71° |
43.84° |
从整体上看，科尔沁沙地重心的移动方向是( )
| A．向西北方向移动 | B．向东北方向移动 |
| C．向东南方向移动 | D．向西南方向移动 |
导致科尔沁草原沙地土地出现连片发展趋势的主要原因是( )
| A．农牧交错带过度垦殖 |
| B．过度樵采破坏固定沙丘的植被 |
| C．牧区严重超载放牧导致草场退化 |
| D．水资源利用不当，浪费严重 |
She packed______ her job, and went off to Qingdao for the Navy celebration.
| A．away | B．off | C．up | D．out |
You waste much time______pig flu.on the internet..
| A．to know | B．knowing | C．know | D．to be known |
---- Is there a vaccine _____ pig influenza?, I’m anxious to know.
----- Don’t worry, there is a vaccine _____ for pigs against pig influenza
| A．for; available | B．against ; use | C．to; access | D．against; available |
Has she had a cold like pig flu. _____? for she is absent.
| A．if anything | B．or anything | C．for anything | D．anything but |
The teacher criticize me, so I must finish my essay about agriculture,farmer and rural areas today______.
| A．anyhow | B．somehow | C．anyway | D．somewhat |