【单选题】【消耗次数：1】
石油主要由( )氢两元素组成的各种烃类组成。
①
氧
②
氮
③
碳
④
硫
参考答案：
复制
纠错
相关题目
【简答题】
网页界面主要由_____ 、_____ 、_____ 组成。
【单选题】
矿物组成和元素组成是造成材料性能各异主要原因，其中材料的矿物组成主要是指（ ）。
①
元素组成相同，但分子团组成形式各异的现象
②
元素组成不同，但分子团组成形式各异的现象
③
元素组成相同，分子团组成形式也相同的现象
④
元素组成不同，分子团组成形式相同的现象
随机题目
【单选题】
14. It is ____ pity that you cannot come to the wedding.
①
such a
②
so
③
such as
④
many a
【单选题】
The man was informed ____ the arrival of the new products. ?
①
to ?
②
on ?
③
of ?
④
with?
【单选题】
4. David watched her car until it ____ from view.
①
remained
②
delayed
③
grew
④
disappeared
【单选题】
You’re ____ your time trying to persuade him. He’ll never join us. ?
①
spending ?
②
wasting ?
③
losing ?
④
missing?
【单选题】
The boy lost his ____when he stepped on the icy road.
①
way
②
weight
③
balance
④
direction
【单选题】
Never in my life ____ or seen such a thing.
①
I have heard of
②
I had heard of
③
have I heard of
④
did I hear of
【单选题】
—I’m sorry to keep you waiting. —Oh, not at all. I___ here only a few minutes.
①
have been
②
had been
③
was
④
will be
【单选题】
The bus is late and Julie is cold. She____ for the bus for 10 minutes.
①
waits
②
waited
③
has been waiting
④
has waited
【单选题】
Put it down, Richard. You mustnt read ____ letter.
①
anyones elses
②
anyones else
③
anyone elses
④
anyone else