皮皮学，免费搜题
登录
搜题
【单选题】
埋地排水用硬聚氯乙烯双壁波纹管，管道安装完毕检查合格后，做检验时，向管道内充水并应保持（ ）。A.
下游管内顶以上2m水头压力
B.
上游管内顶以上2m水头压力
C.
本管内2m以上水头压力
D.
上游管外顶以上1m水头压力
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Part I Short conversation. Short conversation. Listen to five short conversation and choose the best answer to each question you hear. 1.mp3:
A.
Call the secretary again at 10 today.
B.
Make another appointment.
C.
Express his thanks for the call.
D.
Cancel the meeting with the secretary.
【简答题】简述城市政府主要的采购方式。
【单选题】Listen to a short passage and choose the best answer to each question you hear.
A.
Because black cats look like witches.
B.
Because black cats were thought to be witches.
C.
Because black cats bring seven years of bad luck.
D.
Because black cats are hard to notice in darkness.
【单选题】Listen to a short conversation and choose the best answer to each question you hear.
A.
He will apologize to his roommate.
B.
He will give the bicycle back right now.
C.
He will give a call to the woman tonight.
D.
He will play computer s with his roommate.
【简答题】有关中外合作经营企业收益分配的下述说法正确的是( )。 A．合作各方可以分配利润 B．合作各方可以分配生产所得的产品 C．合作各方可以约定收益分配的比例 D．合作各方可以约定外国投资者先行回收投资
【简答题】反映材料抵抗破坏的强度能力称为材料的（）
相关题目：
参考解析：
知识点：
题目纠错 0
发布
