【简答题】Q组合应该放在该区段中所有道岔的岔尖______侧。
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You don't have to pay to watch it.
C.
You don't have to be a sportsman to take part.
D.
The bus trip to the place of the competition is free.
【单选题】用以下几类工作填筑材料时基本工程性质由好到差的正确排列是( )
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You don't have to pay to watch it.
C.
You don't have to be a sportsman to take part in.
D.
The bus trip to the place of the competition is free.
【简答题】求等差数列数列的2,5,8,...的第20项
【单选题】求等差数列 8 , 5 , 2 , ... 的第 20 项。
【多选题】In addition to C-S-H gel, hardened cement contains ( ).
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You can watch it without paying.
C.
You don't have to be a sportsman to take part.
D.
The bus trip to the place of the competition is free.
【简答题】求等差数列 8,5,2 , ... 的通项公式和第 20 项.