机电设备硐室内必须设置足够数量的扑灭电气火灾灭火器材。()
参考答案:对
Tom went off to the EXPO Garden with his friends, ______an exciting day of discovering the unique culture of each nation.
A.expected
B.expecting
C.to expect
D.expects
横道图的优点是( )。
A.灵活、适用性强 B.可借助计算机,从而节约人力,并提高速度C.信息量大 D.能准确表达出施工成本的绝对偏差