一般标准麻花钻的顶角在()左右。 A.108° B.118° C.140° D.90 发布时间:2020-02-08 03:19 │ 来源:www.tikuol.com 题型:单项选择题 问题: 一般标准麻花钻的顶角在()左右。A.108°B.118°C.140°D.90°
题型:单项选择题 punish, approach, represent, nod, express, yawn, introduce, avoid, misunderstand, touch1. Stop ______ and go to bed if you're tired. 2. He ______ by his father for telling lies yesterday. 3. We can't ______ to you how grateful we are. 4. Mr Smith ______ when he passed me in the street. 5. A strong typhoon is ______ Fujian. 6. She ______ her fellow-workers at the union meeting last time.7. May I ______ myself? My name is Meg Johnson.8. Children quickly learn how to ______ punishment.9. He complains that his wife always ______ him.10. Don't ______ the door; the paint is wet. 查看答案
题型:单项选择题 .探究小车速度随时间变化规律的实验中,得到一条记录小车运动情况的纸带,交流电频率50Hz,每五个点取一个计数点如图得到A B C D E五个点,则C点速度为____m/s,D点速度为____m/s, ,AD段平均速度是____m/s,若小车做匀加速运动则加速度大小是___m/s2方向______________(填A B或B A) 查看答案