题目

用一水平方向的力F将一块重为G的木块紧压在竖直的墙壁上，使木块保持静止，下列说法中正确的是A．F<GB．F=GC．增大F，木块与墙壁的静摩擦力也增大D．增大F，木块与墙壁的静摩擦力仍不变  答案：D解析:略  －Where are we going to have dinner this evening? －I’d like to have some ______ in a Japanese restaurant. A. hamburgers   B. fish and chips   C. pizza     D. sushi