在停用的制粉系统进行动火作业，必须将此设备处积粉清除干净，并采取可靠的（），执行动火工作票制度。
A、降粉措施
B、降温措施
C、隔离措施
参考答案：C
Brenda is a contemporary artist, but it's obvious that her painting by Picasso. [ ]
A. has reflected
B. has been influenced
C. has been effected
D. has affected
空载船舶在正横风较强时抛锚掉头，宜采取：（）
A.迎风掉头
B.顺风掉头
C.只能向右掉头
D.只能向左掉头
