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【判断题】微生物农药是指应用生物活体及其代谢产物制成的防治作物病害、虫害、杂草的制剂，也包括保护生物活体的保护剂、辅助剂和增效剂，以及模拟某些杀虫毒素和抗生素的人工合成的制剂。
A.
正确
B.
错误
【单选题】A/抗菌增效剂 B/对铜绿假单胞菌抗菌性能良好的药物 C/对铜绿假单胞菌无效的喹诺酮类 D/口服难吸收，用于肠道感染的药物 E/可治疗支原体肺炎的药物 甲氧苄啶
A.
A．
B.
B．
C.
C．
D.
D．
E.
E．
【单选题】If those "mad moments"— when you can’t recall what your friend has told you or where you left your keys—are becoming more frequent, mental exercises and a healthy brain diet may help. Just as bodies r...
A.
everyone can be forgetful sometimes regardless of one’s age
B.
we can prevent our sound mind from aging with certain methods
C.
brain aging starts from the time when we are in our 20s and 30s
D.
memory loss is a sign that shows we are getting old