DNA双螺旋结构的分子模型的确立,标志着()的诞生。
参考答案:
分子生物学
Seeing the happy _____ of children playing in the park, I’m full of joy and confidence in the future of our country.
A.sight
B.scene
C.view
D.sign
标准正态分布曲线下中间90%的面积所对应的横轴尺度u的范围是()。
A.-1.64到+1.64
B.-∞到+1.64
C.-∞到+1.28
D.-1.28到+1.28
E.-1.28到1.64