【单选题】化合物 的系统命名法名称是
A.
(Z)‐3‐ 甲基 ‐4‐ 异丙基 ‐3‐ 庚烯 ‐6‐ 炔
B.
(Z)‐4‐ 异丙基 5‐ 甲基 ‐4‐ 庚烯 ‐1‐ 炔
C.
(Z)‐5‐ 甲基 ‐4‐ 异丙基 ‐4‐ 庚烯 ‐1‐ 炔
【单选题】When the author says robots are still pretty dumb, he means______.
A.
robots have not yet possessed sense of touch
B.
robots still cannot read
C.
there are still many things robots cannot do
D.
humans are no match for robots
【单选题】Though he spent much time on the last maths problem,yet he still couldn’t__________it.
【判断题】As Mary's violin was old and wothless, she sold it only for seven dollars.
【单选题】defeated,he was 38 aheadof me.
【判断题】稀缺性仅仅是市场经济中所存在的问题。( )
【判断题】As Mary's violin was old and worthless, she sold it only for seven dollars
【简答题】Is he still working? Yes, he_________( still work ) now and he ________ ( not finish) yet.
【简答题】临床上常见的I型超敏反应性疾病有______、______、______、______和______。