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单项选择题

下列哪一个不是真正意义上的化学键: A.
金属键 B.
氢键 C.
离子键 D.
共价键

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单项选择题
‍下列关于细菌素的描述错误的是‍
A．可用于细菌分型和流行病学调查
B．在治疗上应用价值不大
C．具有抗菌作用
D．抑菌谱较广
单项选择题
在办理住房抵押贷款时，用户只需将自有住房到银行作抵押，就可以获得该住房等价值80%的额度，在房产抵押期内可分次提款，循环使用的贷款方式是()。
A.循环贷
B.直客式贷款
C.接力贷
D.置换式个人贷款
单项选择题
George and Margaret and their children?21?at 140 Davis Street,22?the street from a small park.Their house is just off the main road.George usually goes to work by bus,but sometimes he goes?23?his car.The children usually go to school by bus.
The Glenns′house is?24?hidden among the trees.It has small bushes(灌木)planted around it.There is a fence?25 it and the house next door.It is a two-storey house,26 the living room,dining room andkitchen(厨房)on the first floor,and the bedrooms and bathroom on the second floor.
The Glenns spend a lot of time at home.27 now they are at dinner.Conversation(谈话)at the Glenns′house is usually lively at meal time.The children are discussing trips they would like to take.Susan,who has never?28?on a plane,says,"I′d like to?29 a plane to California."Henry,who is elder,thinks it would be fun to be on a?30,heading for adventure(冒险)in Africa.Teddy,the youngest child,says,"I want to go around the world on a train."His elder brother and sister are still trying to?31 to him why this is not possible?32?their mother says,"Children,you′ve spent too much time at the table.Henry and Susan,go and?33 your homework.Teddy,it′s time you were in bed."
Soon there is silence throughout the?34.Teddy is in bed,Susan and Henry are in their rooms studying,and Mr.and Mrs.Glenns are in their living room,35George is sitting in his favorite(最喜欢的)chair,reading the paper and Margaret is sitting on the sofa,doing some sewing.
第25题答案是查看材料
A.among
B.between
C.from
D.across
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