按规定方法则得的石料抵抗磨耗作用的能力,其测定方法分别有()法.
A、洛杉
B、冲击法
C、道瑞法
D、狄法尔法
参考答案:A, C, D
—What do you think of your step-mother?
—There are some things that are not easy to______, but on the whole she is a good mother.
A.come up with
B.catch up with
C.break up with
D.put up with
玻璃体积血常见于()
A.以上全是
B.糖尿病性视网膜病变
C.视网膜血管炎
D.视网膜中央动脉栓塞
E.视网膜中央静脉阻塞