【单选题】关于约束反力,下面哪种说话不正确( )。
B.
链杆的约束反力沿着链杆的中心线,可以是拉力,也可以是压力
D.
固定铰链支座的约束反力通过铰链中心方向不定,用一对正交分力表示。
【单选题】Tom used to be very shy, but this time he was bold enough to give a in front of a large audience.
【简答题】汤姆过去很腼腆,但这次却非常勇敢能在大庭广众面前上台表演了。Tom used to be very shy, but this time he was ______ enough to give a ______ in front of a large audience.
【简答题】Tom used to be very shy, but this time he was bold enough to give a performance in front of a large audience.
【简答题】汤姆过去很腼腆,但这次却非常勇敢能在大庭广众面前上台表演了。 Tom used to be very shy,but this time he was _____ enough to give a performance in front of a large audience.
【单选题】工程上常用 ( ) 来衡量无黏性土的松紧程度 。
【简答题】汉译英 汤姆过去很腼腆,但这次却非常勇敢能在大庭广众面前上台表演了。 Tom used to be very shy, but this time he was bold enough to give a in front of a large audience.
【简答题】工程上常用来衡量无黏性土的松紧程度(孔隙比/孔隙率/相对密实度)。(填空1分)