题目内容

Which of the following is NOT cited as an example to show the protective nature of eyespots

A. Frogs.
B. Fish.
C. Peacocks.
D. Butterflies.

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Which statement is NOT true about Arkwright

A. He was taught to read and write by his cousin.
B. He travelled in Great Britain to collect hair.
C. He was a famous barber.
D. He established a factory with his partners in 1771.

What is this news mainly about

A. The safety of air ambulances.
B. The safety of rescue workers.
C. Air ambulance accidents since 1978.
D. Helicopter crashes since 2000.

锅炉折焰角的主要作用是( )。

A. 凝渣
B. 稳定燃烧
C. 改善传热
D. 防止管排磨损

In Arkwright's view, what property should a spinning machine have

A. It should not require a skilled operator to run it.
B. It should be powered by electricity.
C. It should be able to produce 128 threads at one time.
D. It should be operated by han

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