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【单选题】
玻璃类产品的特点是耐酸(除氟酸外)、耐碱、耐油、防火,钢化后可耐至( )°C。A.
500
B.
200
C.
300
D.
100
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举一反三
【简答题】请从“忙、冷、吵、静、快、辣”中选一种情景,试着写一写。 仿写一个对比句。
【单选题】Few airlines want to impose a total ban on their passengers using electronic devices because
A.
they don't believe there is such a danger as radio interference
B.
the harmful effect of electromagnetic interference is yet to be proved
C.
most passengers refuse to take a plane which bans the use of radio and cassette players
D.
they have other effective safety measures to fall back on
【简答题】A．All airlines have enforced a total ban on electronic devices during flights. B．Portable computers are confirmed as the greatest cause of aircraft crashes. C．It is difficult to predict how electromag...
【单选题】The loss of ability in the mother tongue is mainly caused by the use of electronic devices and a lack of attention to culture.
A.
widespread
B.
visual
C.
ridiculous
D.
precious
【单选题】Such electronic devices ______ are used in a radio set are also found in a computer.
A.
which
B.
that
C.
what
D.
as
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