架空隔热制品距山墙或女儿墙不得小于（）mm。
A、200
B、250
C、300
参考答案：B
斗轮机启动前的检查？
“Will he agree to come to join us in the work?” “No, _______ we promise him more money.”
A．when
B．unless
C．unless
D．as soon as
