单项选择题
Dawson’s example shows that a businessstarts_________.A.when you have climbed somemountainsB.after you have climbedsome muntainsC.with the knowledge of what is neededD.with a moment of sudden realization of inspiration
单项选择题 “Can you ask your neighbors for help?” “I'm afraid not.I_________know any of them.”A.hardlyB.justC.seldomD.only
多项选择题 【多选题】碳素结构钢受力拉伸的弹性阶段具有( )的特点。 A. 应力与应变成正比例关系 B. 应力的增长滞后于应变的增长 C. 应力-应变曲线为一条水平波动线 D. 应力-应变曲线为一条斜线
单项选择题 通常SINR越高,信号越能正确解调,信道环境越好,传输速率越高。 A、正确 B、错误