单选题
Look at the ten statements for this part. You will hear a man talking about "The Wright Brothers ". Decide whether you think each statement is right(R), wrong(W)or not mentioned(NM).
单选题
The Wright Brothers spent a lot of time observing flying birds.
【正确答案】
A
【答案解析】
单选题
The Wrights found the air flowing in wings enabled birds to fly.
【正确答案】
B
【答案解析】
单选题
For the Wrights, the control of the flying aircraft was the key problem.
【正确答案】
A
【答案解析】
单选题
The Wrights spent a lot of money on the first full-size glider.
【正确答案】
C
【答案解析】
单选题
The first piloted glider weighed 50 pound.
【正确答案】
A
【答案解析】
单选题
Not all tests of the 50-pound glider were successful.
【正确答案】
C
【答案解析】
单选题
The wind tunnel was used to test the effects of wing shapes on lift.
【正确答案】
A
【答案解析】
单选题
The new glider flew in 1901 and it had a tail.
【正确答案】
B
【答案解析】
单选题
The powered aircraft was built to learn how propellers work.
【正确答案】
B
【答案解析】
单选题
The Flyer II was built in 1903 with the help of a local banker.