【单选题】Who did he speak to? Did you see_______?
A.
Did you see who did he speak to?
B.
Did you see who he spoke to ?
【单选题】We did hold a meeting yesterday, but you______, so we did not inform. you.
A.
did not need attending
C.
did not need to attend
【简答题】维持蛋白质分子一、二、三、四级结构稳定的主要化学键分别是____、____、____、____。
【单选题】维持蛋白质分子二级结构稳定的主要化学键是
【单选题】维持蛋白质分子二级结构稳定的主要化学键是( )
【简答题】看图,补全对话。 例: — Did you go swimming? — Yes, I did. 1. — Did you go skating? — __________________________. 2. — Did you ___________________? — __________________________.
【单选题】Can you identify the logical fallacy in this claim? “Traffic jam can be solved by traffic control in the downtown area. ”