四川省树德中学高2025级高二上学期10月阶段性测试英语试题

32.What role did the one-way air channels play in the experiment?A.They allowed sharing nutrients.B.They helped defend against pestsC.They regulated experiment conditions.D.They prevented plants'overshadowing.33.What does the underlined phrase"get a shift on"in paragraph 3 mean?A.Give in.B.Speed up.C.Move away.D.Watch out.34.What happened to the fast-growing barley when exposed to air from its rivals?A.They invested more in self-protection.B.They stopped growing to avoid competitionC.They grew faster to maintain their advantage.D.They released more VOCs to warn their rivals