博耶(H.Boyer)和科恩(S.Coben)将非洲爪蟾核糖体蛋白基因与质粒重组后导入大肠杆菌细胞中进行了表达,该研究除证明了质粒可以作为载体外,还证明了_____(答出两点即可)。
__________,身世浮沉雨打萍。(文天祥《过零丁洋》)
如图,在由 10 个完全相同的正三角形构成的网格图中, ∠α,∠β如图所示, 则 cos(α +β)_____.
This book is the lightest and ______ (thin) of all the books.
计算9.6 ÷ 1.92时,要先把1.92的小数点向 ________移动 ________位,原式转化为 ________ ÷192
are ,what ,they ,colour
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Chinese people are very good at table t_____,and it's our favorite sport
He _____(have) got a skipping rope.
short( 反义词 )__________
to ,I,put ,the ,ball ,in,the ,box ,want
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