皮皮学，免费搜题
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【简答题】
生活中常见的甜味剂有蔗糖、糖精、阿巴斯甜、木糖醇、等，但目前最甜的甜味剂是纽甜．已知纽甜的化学式为C 20 H 30 N 2 O 5 ，试计算： （1）一个纽甜分子中所含原子的个数为______； （2）纽甜的相对分子质量为______； （3）纽甜中碳、氢、氮、氧元素的质量比为______．
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举一反三
【单选题】The author of this passage will probably continue to talk about __________.
A.
how to determine what intelligence is
B.
how education should be found
C.
how to solve practical problems
D.
how an unintelligent person should be taught
【单选题】The famous writer gave us _____ about how to write novels. [ ]
A.
talk
B.
a talk
C.
talking
D.
to talk
【单选题】What does the speaker want to talk about?
A.
About how to make films.
B.
About the earliest films.
C.
About the prices for different firms to make films.
【单选题】—What's today's talk about? —It's about how to be polite when we requests. [ ]
A.
have
B.
ask
C.
make
D.
order
【单选题】The main idea of this talk is about______.
A.
how to make a self-analysis when choosing an occupation
B.
what to consider when choosing an occupation
C.
how to choose a well-paid occupation
D.
what to do to survive in the occupational world
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