有三个力，F1=6N，F2=8N，F3=12N，F1和F2的方向垂直，F3的方向 发布时间：2017-07-01 01:02 │ 来源：www.tikuol.com 题型：填空题 问题： 有三个力，F1=6N，F2=8N，F3=12N，F1和F2的方向垂直，F3的方向可任意变，这三个力的合力最大值为______N，最小值为______N．（F1、F2和F3在同一平面）
题型：填空题 从方框中选择适当的词并用其适当的形式填空。give, thank, not, take, look for, find, beOn the way to the Shancheng Theater, Rain knocks into (撞上) an old man.Rain: Sorry, did I hurt you? Mr. Read: Oh, I'm OK. 1 worry about it, young man. You seem to be in a great hurry.Rain: Yes, I'm new here. I am 2 the Shancheng Theater. Could you tell me the way, please? Mr. Read: Certainly. Go down this street till you reach the second crossing (十字路口), then turn right and you 3 it. Rain: How far 4 it from here? Mr. Read: It's about three kilometers. Rain: I must get there as soon as possible, but how can I get there? Mr. Read: There is no bus to go there now. You had better 5 a taxi. Rain: I see. 6 a lot. Sorry for 7 you so much trouble. 1._____ 2._____ 3._____ 4._____ 5._____ 6._____ 7._____ 查看答案
题型：填空题 某男性患者，55岁，右上腹胀痛1个月余，有乙型肝炎病史，查：血红蛋白60g/L，白细胞1.8×109/L，血小板4.1×109/L，胆红素102/μmol/L，碱性磷酸酶18U(布氏)，甲胎蛋白1320/μg/L，大便隐血试验(＋)，体检发现肝脏右肋下约5cm少量腹腔积液，体重下降8kg。为了进一步鉴别诊断应行下列哪项检查最直接A．MRIB．CTC．肝动脉造影D．B超下穿刺活检E．肝脏B超 查看答案