皮皮学，免费搜题
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搜题
【判断题】
工工程建设定额的权威性和强制性的客观基础是定额的科学性。（ ）A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】More and more people have realized that we won’t have cleaner water to drink unless something _______soon.
A.
is done
B.
was done
C.
will be done
D.
to be done
【简答题】铁路线路平面的组成要素包括直线、圆曲线和()。
【单选题】More and more people have realized we won't have cleaner water to drink unless something ______ soon. [ ]
A.
was done
B.
will be done
C.
to be done
D.
is done