对污染严重、工艺设备落后、()和生态破坏严重的电磁辐射建设项目与设备,禁止建设或购买。
A.能耗高
B.资源浪费
C.大气层污染严重
D.危害健康
参考答案:B
综合布线系统的拓扑结构一般分为()
A.总线型
B.星型
C.树型
D.环型.
There is much chance ____ Bill will recover from his injury in time for the race. [ ]
A. that
B. what
C. when
D. which