悬空作业应有牢靠的立足处,并必须视具体情况配置()或其他安全设施。
A.立网
B.栏杆
C.防护栏网
D.安全警告标志
E.安全钢丝绳
参考答案:B, C
Both of his parents insisted that he _______ get on well with his lessons and that he ______ given more extra classes at weekends.
A.didn’t; be
B.didn’t; was
C.doesn’t; should be
D.didn’t; would be
1939年8月23日,苏德双方签了( )和《秘密附属议定书》,划定了双方在东欧的势力范围。这一条约使德国得以进攻波兰,使第二次世界大战终于爆发。
A.《德波友好同盟条约》
B.《苏德友好同盟条约》
C.《苏德互不侵犯条约》
D.《德波互不侵犯条约》