题目内容

________ is the temperature now?

A.
What
B.
How
C.
How many
D.
How much

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阅读理解

In Picture 1, it tells us what happens, how much time it takes to dissolve (溶解)the sugar when tem-perature increases．In Picture 2, it's a room．The heater is working all the time．Can you get any knowledge of how the convection current (对流)is born?

根据图示信息选择最佳答案．

(1)

When the temperature of water is ________, it takes the least time for the sugar to dissolve．
[　　]
A．	50℃
B．	40℃
C．	60℃

(2)

When the wind blows, what happens?
[　　]
A．	Cool air rises．
B．	Warm air falls．
C．	Warm air rises and cool air takes the place of warm air．

(3)

Which of the following is NOT true?
[　　]
A．	From the picture, we can know air can move like liquid．
B．	When air is heated, warm air goes down and cold air rises．
C．	When air is heated, warm air goes up and cold air falls．

(4)

When the temperature of water is 40℃, ________ is needed to dissolve the sugar．
[　　]
A．	40 seconds
B．	23 seconds
C．	15 seconds

(5)

We know that ________ from Picture 1．
[　　]
A．	when the temperature of water is low, it takes the least time to dissolve the sugar．
B．	when the temperature of water is high, it takes the least time to dissolve the sugar．
C．	the temperature of water has no influence(影响)on how soon the sugar dissolves．

One of my favorite things to do is hiking in mountains．Because
nobody likes the idea of getting lost，I always prepare before every
trip．But what’s the best navigation tool，a Global Positioning Sys-
tem(GPS)or a good old map and compass?
Five of my friends and I hiked through the mountains on a trail
(路线)I marked．One team of three carried a GPS，and the other
team used a map and compass．
It took the GPS team 3 hours and 1 1 minutes to get through the
whole hike，however，it took the map and compass team only 2
hours and 49 minutes．The biggest problem the GPS team met was
that they lost the satellite signal(卫星信号)in some places．With
no map or compass，they had to walk around until they were in a
place where the signal was good．The map and compass team was
able to spot different landmarks，compare them to their maps and then use the compass to point them in the right direction．
When I head out on my future hikes，I'm bringing a map，a compass and a GPS to show me the way．
(    )【小题1】The two teams____．
A．had the same navigation tool B．went along the same trail    C．had the same problem
(    )【小题2】The GPS team spent ____ time than the map and compass team in the whole hike．
A．1ess    B．more    C．the same
(    )【小题3】In the end，the writer found out____．
A．the map and compass were too old navigation tools to use any more
B．it wasn’t necessary to bring a map and a compass together with a GPS
C．the GPS had some disadvantages in hiking in mountains

One of my favorite things to do is hiking in mountains．Because
nobody likes the idea of getting lost，I always prepare before every
trip．But what’s the best navigation tool，a Global Positioning Sys-
tem(GPS)or a good old map and compass?
Five of my friends and I hiked through the mountains on a trail
(路线)I marked．One team of three carried a GPS，and the other[来源:Z+xx+k.Com]
team used a map and compass．
It took the GPS team 3 hours and 1 1 minutes to get through the
whole hike，however，it took the map and compass team only 2
hours and 49 minutes．The biggest problem the GPS team met was
that they lost the satellite signal(卫星信号)in some places．With
no map or compass，they had to walk around until they were in a
place where the signal was good．The map and compass team was
able to spot different landmarks，compare them to their maps and then use the compass to point them in the right direction．
When I head out on my future hikes，I’m bringing a map，a compass and a GPS to show me the way．
(   )【小题1】The two teams____．
A．had the same navigation tool B．went along the same trail C．had the same problem
(    )【小题2】The GPS team spent ____ time than the map and compass team in the whole hike．
A．1ess    B．more    C．the same
(    )【小题3】In the end，the writer found out____．
A．the map and compass were too old navigation tools to use any more
B．it wasn’t necessary to bring a map and a compass together with a GPS
C．the GPS had some disadvantages in hiking in mountains

One of my favorite things to do is hiking in mountains．Because

nobody likes the idea of getting lost，I always prepare before every

trip．But what’s the best navigation tool，a Global Positioning Sys-

tem(GPS)or a good old map and compass?

Five of my friends and I hiked through the mountains on a trail

(路线)I marked．One team of three carried a GPS，and the other[来源:Z+xx+k.Com]

team used a map and compass．

It took the GPS team 3 hours and 1 1 minutes to get through the

whole hike，however，it took the map and compass team only 2

hours and 49 minutes．The biggest problem the GPS team met was

that they lost the satellite signal(卫星信号)in some places．With

no map or compass，they had to walk around until they were in a

place where the signal was good．The map and compass team was

able to spot different landmarks，compare them to their maps and then use the compass to point them in the right direction．

When I head out on my future hikes，I'm bringing a map，a compass and a GPS to show me the way．

( ) 1.The two teams____．

A．had the same navigation tool B．went along the same trail C．had the same problem

( ) 2.The GPS team spent ____ time than the map and compass team in the whole hike．

A．1ess B．more C．the same

( ) 3.In the end，the writer found out____．

A．the map and compass were too old navigation tools to use any more

B．it wasn’t necessary to bring a map and a compass together with a GPS

C．the GPS had some disadvantages in hiking in mountains