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【单选题】
Read the passage and choose the correct ones.I've got a brother who is two years older than I am. Sometimes he's OK but other times he is a real pain in the neck. I'll give you some examples. Yesterday I couldn't put the key in the front door because it was dark and I couldn't see where the keyhole was. Did my brother help? No, he just told me how stupid I was. And last week when I came back from the hairdresser's he took one look at me and laughed. "No boy will go out with you looking like that. But don't worry. I can help you. Here, take this paper bag and put it over your head." Have you any idea how I felt?On the other hand, having a big brother can be useful. My parents are not so worried about letting me go out at night as they would be if I were an only child.Another good thing is that all his friends are also two years older and there is one boy who I like very much and who is very good at math so when they all gather at our house, I make sure that I’m there and always have a problem with my math homework that only he can help me with. I hope he can help with more than my homework!
A.
The writer likes the friend.
B.
The friend wants to help with more than the math homework.
C.
The writer only wants the fiend to help with the math homework.
D.
The writer likes the friends.
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【判断题】插花作品是用来美化和装点环境的,因此越多越好。
A.
正确
B.
错误
【简答题】铰链四杆机构的三种类型有: 、 、 。
【简答题】鲢鱼的鱼头大约占体长的 _______; 鳙鱼的鱼头大约占体长的 _______ 。
【单选题】关于华法林的特点叙述,正确的是
A.
口服无效
B.
起效快
C.
作用持续时间长
D.
体内外均抗凝
【判断题】一致性控制是为了确保每笔经济业务的发生都能用正确的金额及时地记入账户的一种控制。
A.
正确
B.
错误
【简答题】鲢鱼的鱼头大约占体长的 ;鳙鱼的鱼头大约占体长的 。
【简答题】鲢鱼的鱼头大约占体长的( );鳙鱼的鱼头大约占体长的( )
【单选题】对霉菌的防腐效果比较好的防腐剂是
A.
苯甲酸钠
B.
山梨酸钾
C.
丙酸钠
D.
亚硝酸钠
【多选题】下列关于脱氢乙酸的说法正确的有。
A.
脱氢乙酸是广谱防腐剂,特别对霉菌和酵母的抑菌能力强,为苯酸钠的2-10倍
B.
脱氢乙酸的LD50值为1000mg/Kg,比苯甲酸及山梨酸的LD50值都低,因此脱氢乙酸的急性毒性要比苯甲酸及山梨酸小
C.
脱氢乙酸在较高pH范围内仍有很好的抗菌素菌效果,当pH大于9时,抗菌活性才减弱
D.
脱氢乙酸主要是抗酵母菌和霉菌,在高剂量才能抑制细菌
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