交感性眼炎一般发生在穿通性眼外伤后的()
A.1周以内
B.2周以内
C.2~8周
D.2~8个月
E.1~3年
参考答案:C
解析:交感性眼炎通常发生在穿通伤后2~8周。
The meeting _______for two hours, but they still ______any agreement.
A.has been going on; haven’t reached.
B.has been going on; haven’t been reached.
C.was going on; haven’t reached
D.was going on; haven’t been reached
真空断路器的单极行程不够,可以调整单极绝缘拉杆的长度提高行程的要求。