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问题
填空题
若直线x-y=1与直线(m+3)x+my-8=0平行,则m=( )。
答案
选择题
— Do you think you could do without help?
— ______. This is not the first time for me.
A. Take care
B. Hurry up
C. Not exactly
D. Don't worry
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填空题
核酸变性过程中,紫外光吸收达到最大值50%时温度称为________,其主要与核酸的________最终含量有关.
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