【单选题】听力原文: Russian commandos have stormed a hijacked bus in the southern Tajikistan Republic and freed all 18 hostages aboard. Security officials say the two gunmen who had held the bus for 8 hours were ar...
【单选题】It is high time we ___ off.
【单选题】It is high time we ______.
【单选题】It is high time we ______ this practice.
【单选题】在长光路系统中,往往利用()达到前后系统的光瞳衔接,以减小光学零件的口径。
【单选题】紫外-可见光谱法 检验 一氧化碳 中毒 检材 时, 氧合血红蛋白吸收峰分别 什么范围出现 ( )
【简答题】It is high time we go home. A B C D ____________
【简答题】It is high time we ______ (start) to pay attention to such mistakes.
【单选题】____________________ is the first extant work on dramatic theory.