问题
单项选择题
维持细胞较快的生长增殖速度,需添加的血清量为()
A.1%~2%
B.2%~5%
C.5%~10%
D.10%~20%
E.20%~25%
答案
参考答案:D
维持细胞较快的生长增殖速度,需添加的血清量为()
A.1%~2%
B.2%~5%
C.5%~10%
D.10%~20%
E.20%~25%
参考答案:D
用方框中所给单词的适当形式填空,使短文完整正确。(每个单词限用一次)
Amelia was 小题8:. moved and asked Sam to take her to his home. He led her to a small house. Amelia saw a woman lying on the bed. The woman knew she was dying. She said to Amelia, “Please find a 小题9:. for my son.” Amelia 小题10:. her hand and nodded with tears(眼泪). She got an idea! Her husband and she had no children, and looking forward to having one. Later Amelia brought Sam home. Ever since then, the new family have had happiness and laughter. |