组塔作业点周围()m内的()应清除干净。
A.3
B.5
C.易燃易爆物
D.水泥
E.钢材
参考答案:B, C
Nowadays more and more people are advised to arrange for insurance_____that they or their family members need medical treatment.
A.in order
B.in need
C.in case
D.in hope
与阿苯达唑相符的叙述是
A.有旋光性,临床应用其左旋体
B.易溶于水和乙醇
C.有免疫调节作用的广谱驱虫药
D.含苯并咪唑环的广谱高效驱虫药
E.不含硫原子的广谱高效驱虫药