与血红蛋白有特殊亲和力,适用于治疗出血性疾病和血管瘤的是()。
A.Nd:YAG激光
B.CO2激光
C.准分子激光
D.氩离子激光
E.砷铝镓半导体激光
参考答案:D
A proposal has been put forward at a recent video conference _______ measures be taken to raise the citizens’ awareness of traffic safety.
A.that
B.as
C.when
D.which
远洋运输中,装货清单上缩写符号Botl表示()包装形式。
A.箱装
B.袋装
C.桶装
D.瓶装