C₂、C₈、C₁₈柱的亲至性依次减弱。

[单选题](C18)A．prohibitedB．avoidedC．forbiddenD．consented

[单选题](C18)A．statedB．remarkedC．saidD．told

[试题]请问C18柱是正相还是反相色谱柱？CN柱呢？

[单选题](C8)A．toB．inC．forD．of

[单选题](C8)A．better thanB．other thanC．rather thanD．sooner than

[单选题](C8)A．despairB．worryC．panicD．moment

[单选题](C8)A．releasedB．producedC．investigatedD．conducted

[单选题](C8)A．puzzlesB．problemsC．freedomD．shortages

[单选题](C8)A．manufacturedB．arisenC．composedD．created

[单选题](C8)A．presentB．offerC．manifestD．indicate