在一幅比例尺为1：10000000的地图上，测得德州到北戴河的距离是3

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问题解答题

在一幅比例尺为1：10000000的地图上，测得德州到北戴河的距离是3厘米．小亮一家开车到北戴河旅游，平均每小时行驶100千米，他们上午7：30从德州出发，几时能到达北戴河？

答案

3÷

10000000

=30000000（厘米）

=300（千米）；

300÷100=3（小时），

7时30分+3时=10时30分；

答：10时30分能到达北戴河．

阅读理解

阅读理解，选择正确答案。

Jim and Mary are brother and sister. They are twins. They like to swim and ride a bike. They like to fiy

kites, too. They often fly kites near the river. The kites are very high. They are very happy. But not all of their

favourite games are the same. Jim likes to play soccer and Mary likes to play ping-pong. Jim likes to jump high.

He thinks it's easy. But Mary thinks it's very hard. Mary likes to play with doll, but Jim doesn't. Mary can sing

very well and Jim can throw yo-yo very well.

l. They both like .[ ]

A. swimming

B. riding a bike

C. flying kites

D. all of them

2. Where do they often fly kites ?[ ]

A. Near the river.

B. On a hill.

C. Near their houses.

D. At school.

3. What game does Mary like ?[ ]

A. Soccer.

B. Basketball.

C. Ping-pong.

D. Volleyball.

4. What game does Jim like ?[ ]

A. Soccer.

B. Basketball.

C. Ping-pong.

D. Volleyball.

填空题

铁铵矾指示剂法回滴法测定I－（）。