下列( )情况对土质边坡的稳定性是有利的。
A.增加坡高
B.坡顶堆载
C.土坡浸水
D.坡度放缓
参考答案:D
动物能对植物生活产生的积极作用,主要表现在( )
A.帮助躲避不良环境
B.协助传粉
C.促进呼吸作用
D.促进光合作用
—Pop star Allen Su has done more than just donate money.
—Yes, he has made a song ______ We're together ______ the earthquake victims. [ ]
A. called; to cheer up
B. call; to cheer up
C. calling; cheer up
D. called; cheering up