以下哪项不是急性闭角型青光眼急性发作期的表现()。
A.眼压突然升高
B.视力急剧下降
C.瞳孔中度散大
D.前房加深
E.角膜雾状浑浊
参考答案:D
中等价值的部件修理费用与新件价格的关系是修理费不高于新件价格的()
A.20%
B.30%
C.40%
D.50%
There are quite a few old books on the shelf, but _____ of them is useful to him. [ ]
A. both
B. all
C. neither
D. none