lfa teacher asks students to fill in the blanks in a passage

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[单选题]lfa teacher asks students to fill in the blanks in a passage with "that" "which" or "whom" he/she is least likely focusing on grammar at________.

A. lexical level
B. syntactic level
C. discourse level
D. morphological level

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学习资料：

[单选题]学生学习了杠杆的力臂原理，再学习定滑轮的知识，理解了定滑轮实质上是一种等臂杠杆，这种学习属于( )。

A. 上位学习
B. 下位学习
C. 并列学习
D. 结合学习

[单选题] After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death toll could have been much worse. More than 60 people died in this earthquake. By comparison, an earthquake of similar intensity that shook America in 1988 claimed 25,000 victims. Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4:31 am on a holiday, when traffic was light on the city's highways. In addition, changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city's buildings and highways, making them more resistant to quakes. Despite the good news, civil engineers aren't resting on their successes. Pinned to their drawing boards are blueprints for improved quake resistant buildings. The new designs should offer even greater security to cities where earthquakes often take place. In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to reduce the impact of ground vibrations, The most recent designs give buildings brains as well as concrete and steel supports. Called smart buildings, the structures respond like living organisms to an earthquake's vibrations. When the ground shakes and the building tips forward, the computer would force the building to shift in the opposite direction. The new smart structures could be very expensive to build. However, they would save many lives and would be less likely to be damaged during earthquakes.

The smart buildings discussed in the Passage ________.

A. would cause serious financial problems
B. would be worthwhile though costly
C. would increase the complexity of architectural design
D. can reduce the ground vibrations caused by earthquake

[单选题]PWP approach for teaching writing includes the following parts except ________.

A. pre-writing
B. while-writing
C. post-writing
D. intensive-writing

[单选题] Plants and animals that have been studied carefully seem to have built-in clocks.These biological clocks, as they are called, usually are not quite exact in measuring time.However, they work pretty well because they are "reset" each day, when the sun comes up. Do pigeons use their biological clocks to help them find directions from the sun?We can keep pigeons in a room lit only by lamps.And we can program the lighting to produce artificial "days", different from the day outside.After a while we have shifted their clocks.Now we take them far away from home and let them go on a sunny day.Most of them start out as if they know just which way to go, but choose a wrong direction.They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks. It is known and experimented that homing pigeons can tell directions by the sun.But what happens when the sky is darkly overcast by clouds and no one can see where the sun is?Then the pigeons still find their way home.The same experiment has been repeated many times on sunny days and the result was always the same.But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions.So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun. Naturally, people have wondered whether pigeons might have a built-in compass-something that would tell them about the directions of the earth′s magnetic field.One way to test that idea would be to see if a pigeon′s sense of direction can be fooled by a magnet attached to its back. With a strong magnet close by, a compass can no longer tell direction. To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs. Another group carried brass bars instead which were not magnetic.In a number of experiments, both groups were taken away from home and let go.On sunny days none of the magnet-pigeons was fooled.They were just as good as the brass-pigeons in starting out in the right direction toward home.On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction, but the magnet-pigeons were in trouble.They later started out in different directions and acted completely lost.

Which is true about pigeons′ finding directions?

A. With a brass on back they can find directions sooner.
B. They can find directions better than other birds.
C. They use the earth′s magnetic field and the sun to find directions.
D. They can find directions only to their home.

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