【单选题】We very much regret that we fait to complete the work ( )the agreed contract time.
【单选题】She agreed____us,so we agreed____ the plan at last. [ ]
【单选题】对不同程度荒漠的治理思路,正确的是 ( )
A.
半干旱农牧过度区和旱农区应当建立以绿洲为中心的防护林体系
【单选题】离子交换层析装柱时,树脂在柱内有明显的分界线这是因为( )原因造成的。
【单选题】将椭球面上的经纬线投影到高斯平面上,( )长度没有发生变化。
【简答题】His plan was such a good one ______ we all agreed to accept it. A. as B. that C. so D. after which