逐渐视力下降无眼痛的眼病不包括
A．慢性视网膜疾病B．屈光不正C．视网膜中央动脉阻塞D．白内障E．开角型青光眼
参考答案：C
--- What’s reported in the news
--- The earthquake yesterday is said _______ more than 5 hundred people.
A．to kill
B．that it is
C．to have killed
D．that it has killed
根据往复泵完好的标准，对于塑料类填料轻质油泄漏不能超过（）。
A.10滴/分钟
B.15滴/分钟
C.20滴/分钟
D.30滴/分钟
