【单选题】The English vocabulary is known for a (an) ______ of words which are comparatively seldom used in ordinary conversations.
【单选题】Theis is one of the most interesting questions that ____ asked.
【单选题】The Chinese vocabulary is a(an) _______ system of codes.
【简答题】English vocabulary is a(an) _________ system of codes.
【单选题】患者,男,30岁,因发生车祸造成胸部损伤,多根多处肋骨骨折,出现反常呼吸,是因为
【简答题】根据下图推测,CsCl晶体中两距离最近的Cs + 间距离为a,则每个Cs + 周围与其距离为a的Cs + 数目为________;每个Cs + 周围距离相等且次近的Cs + 数目为________,距离为________;每个Cs + 周围距离相等且第三近的Cs + 数目为________,距离为________;每个Cs + 周围紧邻且等距的Cl - 数目为________。
【简答题】Theis is one of the most interesting questions that ____ (be) asked.A. have been
【简答题】Chinese vocabulary is a(an) _________ system of codes.
【单选题】不用计算,试确定下列反应中 ΔH 与 ΔU 相差最大的是( )
A.
C ( s ) + Si ( s ) = SiC ( s )
B.
C ( s ) + 1/2 O 2 ( g ) = CO ( g )
C.
C ( s ) + O 2 ( g ) = CO 2 ( g )
D.
2C ( s ) + 3H 2 ( g ) =C 2 H 6 ( g )