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【单选题】
原油的凝固点是指原油冷却过程中自由流动态到失去流动性的临界温度点，它与原油中的-----等有关，影响因素十分复杂。原油凝固点大约在-----称为油。A.
含硫量、沥青胶质含量及轻质油含量/-46℃到+40℃之间。凝固点高于40℃
B.
含蜡量、沥青胶质含量及轻质油含量/-56℃到+50℃之间。凝固点高于40℃
C.
含盐量、沥青胶质含量及轻质油含量/-66℃到+60℃之间。凝固点高于40℃
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【单选题】David was a young man who worked in an office in a big city. His hobby was fishing, but he didn't often get a chance to practise it. Then one summer he decided to have a holiday in a beautiful place i...
A.
interested in
B.
good at
C.
expert in
D.
not fond of
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【简答题】完形填空 David was a doctor. He spent 1 time in playing when he was in the medical college. Of course, he learned nothing. Later on he tried to find a 2 in the cities, but he failed. He 3 return to his ho...
【简答题】One day, many years ago, when I was working as a psychologist(心理学家) in England, David was brought into my office. His face was pale（苍白的）and he looked at his own feet. David lost his father when he was...
【简答题】阅读理解。 One day. Many years ago, when I was working as a psychologist in England, David was brought into my office. His face was pale (苍白) and he looked at his own feet. David lost his father when he wa...
【单选题】David was responsible and hardworking, _____ he was promoted from a clerk to a manager.
A.
which
B.
as
C.
for what
D.
for which
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