问题
单项选择题
注浆施工在暗挖隧道结构中采用超前导管预加固技术，钻孔的外插角为（）。
A、10°~15°
B、12°~15°
C、13°~15°
D、14°~15°
答案
参考答案：A
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注浆施工在暗挖隧道结构中采用超前导管预加固技术，钻孔的外插角为（）。
A、10°~15°
B、12°~15°
C、13°~15°
D、14°~15°
参考答案：A
根据短文内容，用方框中所给词语的适当形式填空。
you are __4__ after work, you can __5__ the city's quietness here. And there is a __6__ park near here. In the morning or after __7__, you can __8__ through the park. __9_ the park is a bookshop. There are many __10__ books in the shop. So sometimes in the park, you can see many people enjoy their books. |