【简答题】描述Matthew和Franklin所做的证明DNA半保留复制的实验。
【简答题】动词运用。 I'm an American boy. I 1______ (come) to China in 2006. I 2______ (study) here for two years. My father often 3______ (take) me 4______ (play) football on the playground. Last Sunday, I 5______ ...
【简答题】Matthew ______ for a living at a new golf course.
【多选题】冲裁大小不同、相距较近的孔时,为了减少孔的变形,应先冲的孔
【单选题】After graduation I hunted for jobs here and there, meeting with many setbacks,_______ I obtained a vacant post in a small business.
【单选题】冲裁大小不同、相距较近的孔时,为了减少孔的变形,应先冲()的孔,后冲小和精度高的孔。
【简答题】什么叫区间估计?什么点估计?置信度与区间估计有什么关系?
【单选题】This is the third time I _______ Beijing. The second time I ______ here was on Christmas Day last year.
B.
have visited; have come