熔封时火焰过大，拉丝时丝头过长可致（）。
A.剂量不准
B.焦头
C.泡头
D.尖头
E.瘪头
参考答案：D
_____the 19th-century America, the novel Gone with the Wind tells the story of a woman facing war and starvation bravely.
A．Set up
B．Set down
C．Set in
D．Set off
立警为公、执法为民
