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【单选题】
食物中最主要的必需脂肪酸是A.
亚麻油酸
B.
油酸
C.
亚油酸
D.
软脂酸
E.
花生四烯酸
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皮皮学刷刷变学霸
举一反三
【单选题】Which of the following is NOT true according to the poor electrical and thermal conduction property of ceramics?
A.
The valence electrons are tied up in bonds and are not free in ceramics
B.
Diamond which is classified as a ceramic has the highest thermal conductivity of any known material
C.
the oxide ceramic ReO3, has an electrical conductivity at room temperature similar to that of Cu
D.
the mixed oxide YBa2Cu3O7 has zero resistivity below 92℃
【单选题】If the IT0 and IT1 bits of the TCON register are , an interrupt will be generated on high to low transition, i.e. on thefallingpulse edge (only in that moment).
A.
set
B.
cleared
C.
high resistivity state
D.
not determined