人体正常细胞染色体数目为46条，一个卵原细胞经过减数分裂产生的卵细胞染色体数目是[ ]
A．23条
B．32条
C．46条
D．92条
答案：A
Make sentences.（连词组句）
1. play piano Sometimes I the (.)
_________________________________________
2. on What weekend do you the do (?)
3. get the I usually morning in at 6:00 up (.)
4. out weekend go Let's on the ( !)
5. go do When home you (?)
说出工件坐标系设定的常用G指令？什么是工件零点偏置？
