题目内容

通过铺设草方格，埋设防沙障等方式可以防止沙漠进一步扩展。（）

A. 对
B. 错

查看答案

搜索结果不匹配？点我反馈

更多问题

海湾战争后GPS技术民用化，为处方农业提供定位手段。

A. 对
B. 错

测土配方施肥技术的核心是调节和解决作物需肥与土壤供肥之间的矛盾。

A. 对
B. 错

The three men tried many times to sneak across the border inthe the neighboring coutry_________ by the police each time.

A. had been captured
B. being always captured
C. only to be captured
D. unfortunately captured

Professor Johnson is believed ______ some significant advance in his research in the past year.

A. having made
B. making
C. to have made
D. to make