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问题 选择题

下列叙述和结论不正确的是（　　）

A．连接仪器的一般顺序是：从下到上．从左到右

B．过滤操作的关键是：一贴、两低、三靠

C．人工净化水的一般步骤是：沉降、过滤、杀菌消毒

D．配制一定质量分数溶液的正确操作是；称量、计算、溶解

答案

答案：D

阅读理解

Mike is an American.  Now he’s in No. 8 Junior High School in Tengzhou.  He’s in Class 5, Grade 7.  Every day he gets up early.  He always goes to school in his father’s car.   His classes begin at 8:00 a.m.  He has four classes in the morning.  He has lunch at school at about 12:00 a.m.  He has two classes in the afternoon.  After school, he goes home by car at 5:30 p.m.  and has dinner at 6:30 p.m.  After  dinner,  he  does  his  homework  with  his  sister  and  then  he  plays  the  guitar  for  a  while.  At about 9:00 p.m.  he goes to bed.

小题1:Where  is  Mike  from ?

A. England   B. The U.S.A.  C. Canada D. Japan

小题2:How  does  Mike  go  to  school ?

A．By bike

B．By car

C．On foot

D．By train小题3:Where  does  Mike  have  lunch ?

A．At home

B．At school

C．In a shop

D．In a restaurant(饭馆)。小题4:How  many  classes  does  Mike  have  every  day ?

A．Six

B．Two

C．Three

D．Four小题5:What  does  Mike  do  after  dinner ?

A．He does his homework and plays the guitar.

B．He plays soccer.

C．He watches TV.

D．He goes to bed.
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选择题

下面对算法描述正确的一项是：（  ）

A 算法只能用自然语言来描述    B 算法只能用图形方式来表示

C 同一问题可以有不同的算法    D 同一问题的算法不同，结果必然不同
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