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【单选题】
光气（COCl2）是一战和二战时常用的化学毒剂之一，因可以使用氯气和一氧化碳在阳光下直接合成得名，合成方程式为CO(g)+Cl2(g)→COCl2(g)。反应速率公式【图片】 。保持温度和CO浓度不变，将Cl2的浓度增大到原来的三倍，其反应速率增大到原来的5.2倍，对Cl2而言，反应级数n为A.
1
B.
1.5
C.
2
D.
2.5
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知识点：
皮皮学刷刷变学霸
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【简答题】春天像刚落地的娃娃, ,他生长着。(《春》朱自清)
【单选题】Jeff goes to work _____ and his wife goes to work _____. [ ]
A.
by car; on her bike
B.
by a car; on her bike
C.
by cars; by bike
D.
by his car; by bike
【单选题】Jeff goes to work _______ and his wife gaes to work ________. [ ]
A.
by his car, by bike
B.
by a car, by bike
C.
by cars, by bike
D.
by car, on her bike
【单选题】Jeff goes to work _______and his wife goes to work_______ [ ]
A.
by car; on her bike
B.
by a car; on her bike
C.
by car; by bikes
D.
by his car; by her bike
【多选题】下列哪些属于急性化脓性阑尾炎的特点（）
A.
阑尾显著肿胀、充血
B.
阑尾各层均有大量中性粒细胞浸润
C.
阑尾腔内常有积脓
D.
常有阑尾周围炎及局限性腹膜炎
E.
阑尾表面常有脓性渗出物
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