CO分子的化学吸附都有哪几种可能的吸附态?为什么会存在多种吸附态?
The bed-plate is secured in the longitudinal direction by means of bolts known as ().
A. end-chock bolts
B. side-chock bolts
C. through bolts
D. tie rod
MyoD是一种bHLH蛋白,对肌细胞的发育很重要,它的活性是如何被调控的?
新生儿出院前应进行先天性甲状腺功能低下、苯丙酮尿症及听力筛查。()
A. 正确
B. 错误