题型：补全对话，情景问答 句子配对。( )①Let's play ping-pong. ( )②Let's play volleyball. ( )③Do you have a dictionary?( )④Does he have a baseball? ( )⑤Where are my books? ( )⑥Is there an apple on the table?( )⑦Where is his basketball?( )⑧Your watch is very nice.( )⑨Is this your friend?( )⑩What's this?A. Yes, I do. B. Sorry, I don't have a ping-pong ball. C. No, he doesn't. D. That sounds good. E. It's under the bed. F. Thank you. G. They are on the TV. H. It's a hat. I. Yes ,he is. J. Yes ,there is. 查看答案
题型：单项选择题 在能见度不良的水域中航行，雷达上测得与来船构成碰撞危险，假设来船的航速和航向均保持不变，本船所采取的行动，下列说法正确的是：（）Ⅰ、对本船右正横前的船舶，本船采取减速和向右转向两者的效果一定一致Ⅱ、对本船左正横前的船舶，本船采取增速和向右转向两者的效果一定一致Ⅲ、对本船右正横后的船舶，本船采取减速和向右转向两者的效果一定一致A.ⅠB.Ⅰ、ⅡC.Ⅰ、Ⅱ、ⅢD.Ⅰ、Ⅲ 查看答案
题型：选择题 在硫酸铝、硫酸钾和明矾的混合溶液中，如果SO42-的浓度为0.40 mol·L-1，当加入等体积0.40 mol·L-1 KOH溶液时， 生成的沉淀恰好完全溶解，则反应后溶液中K+的浓度最接近于 [ ]A．0.25 mol·L-1 B．0.45 mol·L-1 C．0.50 mol·L-1 D．0.90 mol·L-1 查看答案
