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【单选题】
狭义上的线粒体病是指( )A.
线粒体功能异常所致的疾病
B.
mtDNA突变所致的疾病
C.
线粒体结构异常所致的疾病
D.
线粒体数量异常所致的疾病
E.
mtDNA数量变化所致的疾病
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皮皮学刷刷变学霸
举一反三
【单选题】The boy was too busy ______ his father last term.
A.
to hear from
B.
to write to
C.
hearing from
D.
write to
【简答题】听下面一段材料，回答第1至3题。 1. Why didn't the boy book the room before? A. He forgot to do so. B. He didn't know how to book it. C. He was too busy 2. When will the competition begin? A. At 6: 30 p.m. B. At 3: 3...
【简答题】The boy replied ................ he was too busy.
【简答题】Fill in the transition words and phrases. 1. The boy replied ................ he was too busy.
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