题目

Through the reform, the economic situation of China ________ much better than it used to be. A. turned into               B. turned off           C. turned to                D. turned out 答案：D人类生殖细胞、体细胞和受精卵中个含有多少条染色体（   ）A、23条、46条、23条         B、46条、46条、23条C、23条、46条、46条         D、23条、23条、23条