限制酶是一种核酸切割酶,可辨识并切割DNA分子上特定的核苷酸碱基序列。下图为四种限制酶BamHI,EcoRI,HindⅢ以及BglⅡ的辨识序列。箭头表示每一种限制酶的特定切割部位,其中哪两种限制酶所切割出来的DNA片段末端可以互补黏合?其正确的末端互补序列为何?( )
It was the training _____ he had as a young man _____ made him such a good engineer.
______ about the missing Beijing-bound Malaysian flight that he decided to look for more information about it.
In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
It ________ we had stayed together for a couple of weeks ________ I found we had a lot in common.
My former class teacher asked me to go and see him whenever _________.