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名词解释题
pachytene stage, pachynema (粗线期)
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灯刷染色体是哪一时期的卵母细胞染色体（）A、细线期（leptotene）B、合线期（zygotene）C、粗线期（pachytene）D、双线期（diplotene）E、终变期（diakinesis）
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单选题In the operation of a flash type evaporator equipped with air ejectors,the air and non- condensable gases are evacuated directly from the （）.A
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单选题When rigging a stage，the standing part should be fastened to the horns of a stage with which of the following hitches（）.A
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单选题The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）A
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单选题When lowering manropes alongside a stage rigged over the side of a vessel，they should be allowed to trail in the water（）.A
to easily remove the kinks that form in the linesB
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only for short periods of time since they will become waterlogged and be very heavy to pull up
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名词解释题P-DNA （粗线期DNA）
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