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【单选题】
表面活性剂在结构上的特征是( )A.
一定具有磺酸基或高级脂肪烃基
B.
一定具有亲水基
C.
一定具有亲油基
D.
一定具有亲水基和憎水基
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】关于左旋多巴治疗帕金森病描述正确的是
A.
与外周脱羧酶抑制药合用可提高疗效
B.
可用于治疗吩噻嗪等抗精神病药所引起的帕金森综合征
C.
治疗肝性脑病
D.
对肌肉僵直的运动困难疗效好
E.
能引起精神障碍
【简答题】The pressure of too much homework has led to an evident _______ among the students. A. shortage B. minimum C. refusal D. decline
【单选题】The accounting manager ------- concerns that his accountants were under too much pressure to finish the report by the deadline.
A.
proposed
B.
commented
C.
regarded
D.
expressed
【单选题】Too much pressure from study leads to sleeplessness, which _______ increases the risk of forgetfulness.
A.
in turn
B.
in return
C.
by chance
D.
by choice
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