使用过滤式防毒面具时要求环境中氧含量必须占()以上。
A.50%
B.18%
C.10%
D.2%
参考答案:B
--- Where did you meet him for the first time?
--- Maybe it is in the museum we listened to the lecture we got to know each other.
A.that; that
B.where; that
C.which; that
D.that; which
大学毕业生就业观念的特点()。
A.对工作期望值过高,自我存在“精英意识”
B.仍然存在传统的就业观念
C.不能正确的认识和面对激烈的就业竞争
D.存在“等靠要”的依赖心理