题型：问答题 简答题 给问句选择合适的答话。( ) 1. How are you?( ) 2. What's your name?( ) 3. What day is it?( ) 4. How's the weather? ( ) 5. What is it?( ) 6. Where does he work?A. It's a library. B. Fine, thanks.C. It's cold and snowy.D. He works in a mall.E. It's Monday.F. My name is Jenny. 查看答案
题型：问答题 简答题 （9分）传送带与水平面夹角为37°，皮带以12 m/s的速率沿顺时针方向转动，如图所示。今在传送带上端A处无初速度地放上一个质量为m的小物块，它与传送带间的动摩擦因数为0．75，若传送带A到B的长度为24 m，g取10 m/s2，则小物块从A运动到B的时间为多少？ 查看答案
