A-A+
Alight with no more power than ______ by an or
问题详情
Alight with no more power than ______ by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinpoint-sized beam.
A．as is produced
B．that produced
C．that is produced
D．produced
参考答案
正确答案：B
解析：相当于A light with no more power than the power that is produced by... that 代替power，表示相比较的事物，而D中没有比较对象，故不对；as 表示原级比较，不与than 用在一起，故A也不正确；C中缺少that 的先行词，也是错误的。
