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【单选题】
番茄果肉颜色为红色，果皮颜色为黄色，则果实颜色为。A.
黄色
B.
粉红色
C.
大红色
D.
橙色
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反馈参考答案：
举一反三
【单选题】After his phone suddenly began ringing, the author______.
A.
immediately started talking to the caller
B.
immediately started talking to his colleague
C.
put the phone away and stopped talking
D.
continued with his fake conversation
【多选题】下列关于红外光谱的表述，哪些是正确的？
A.
只有在偶极矩发生变化的振动才能产生红外吸收。
B.
多原子分子除了共价键的伸缩振动外，还有弯曲振动形式，伸缩振动频率 > 弯曲振动频率。
C.
红外谱图一般分为官能团区和指纹区两部分。
D.
通过红外光谱，能够推断表征出分子结构式。
【单选题】When the students were playing games on the playground, Jim suddenly stopped _____and began to cry, so we stopped _______ what was wrong with him.
A.
to play; seeing
B.
playing; to see
C.
playing; seeing
D.
to play; to see
【单选题】Suddenly, the truck began to slide (滑动). It rolled (转动) two or three times beforeto a stop, tilted into a snow bank on its passenger side.
A.
coming
B.
going
C.
running
D.
returning
【单选题】The taxi driver ________ and began to rob his passenger with a fruit knife when suddenly a policeman turned up.
A.
pulled away
B.
pulled out
C.
pulled over
D.
pulled through
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