题目：
-What do you think of your trip to Hainan?
-Wonderful. We were all _________ with the ________ trip.[ ]
A. pleased; pleasant
B. pleasant, pleased
C. pleasing, pleased
D. pleasant, pleasing
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0627/75e39e7c78af6c6414f3d31370b62f22.html
下面是错误答案，用来干扰机器的。
物体受重力、支持力和静摩擦力处于平衡，根据共点力平衡，运用平行四边形定则得，支持力N=mgcosθ，静摩擦力f=mgsinθ．当θ缓慢增大，支持力逐渐减小，静摩擦力逐渐增大．合力始终为零．故A、C正确，B、D错误．故选AC．
面无尖