题目内容
（请给出正确答案）
It is hard to learn the______(operate) of this complicated machine.
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更多“It is hard to learn the______（operate) of this complicated machine.”相关的问题
I don' t think physics (is) hard (to learn). (However), my physics (are) very poor.
A．is
B．to learn
C．However
D．are
A．none
B．neither
C．both
D．each
What can we learn about Fredy？
A．He helps those who will work hard themselves.
B．He likes to give his help to anyone in need.
C．He always gives help to the unemployed.
D．He is easily moved by poor people.
English is difficult to learn,______, we should try hard to study it well.
A．so
B．however
C．therefore
D．otherwise
A.of,for
B.of,of
C.for, of
D.for, for
From this passage we know that ______ .
A．we can learn English easily
B．English is too difficult to learn
C．English is a useful language but one must work hard to learn it
What makes it so hard for the face-recognition systems to work effectively？
A．The computers are not so advanced.
B．The faceprints of the mugshots fed in the computers are never identical with those of real persons.
C．It is very hard for the operators to learn to control the system.
D．People seldom look straight at the camera.
The author would probably agree that______.
A．it's very hard to plant many kinds of flowers in a garden
B．it's good for people from other countries to learn English
C．more and more people like to plant roses in their gardens
D．English is easier to learn than other languages
In Para. 3, the author use the expression of "learn the hard way" to mean that
A．we try to reevaluate our previously held beliefs as we grow older.
B．we refute some moral principles only after we find them inconsistent.
C．we acquire a sense of right and wrong from our real life lessons.
D．we become mature through ignoring our inherited unselfish tendencies.
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