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R410A是近共沸混合制冷剂，由质量分数为 的R32和 的R125组成，其单位体积制冷量可比R22 ，它不能与矿物性润滑油互溶，但能溶解于 合成润滑油。
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【单选题】In recent years, China has made great achievements in science and technology, ____ space technology. [ ]
A.
such as
B.
for example
C.
namely
D.
and so on
【单选题】Travelling in space has been made __________ possible with the development of science and technology.
A.
that
B.
/
C.
it
D.
this
【单选题】The explosion of the Challenger Space Shuttle is mentioned to show that______.
A.
technology is always unreliable
B.
man should be responsible for the technology created by it
C.
man is losing control of such technology
D.
human beings should not create such technology
【单选题】A lot of countries have gained excellent achievements in space technology, China, _____. [ ]
A.
such as
B.
for example
C.
namely
D.
that is
【单选题】The space shuttle program entails the use of sophisticated technology.
A.
enhances
B.
develops
C.
creates
D.
involves
【单选题】A lot of countries have gained excellent achievements in space technology,China, _______. [ ]
A.
such as
B.
for example
C.
namely
D.
and so on
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