题目

______，the more expensive the camera，the better its quality. A．General speaking B．Speaking general C.Generally speaking D．Speaking generally 答案：C如图，某游乐场内滑梯的滑板与地面所成的角∠A=35°，滑梯的高度BC=2米，则滑板AB的长约为    米（精确到0.1）．