夹紧力的确定包括哪些因素？
参考答案：
夹紧力的确定包括对紧力的议程、大小和作用点的确定。
— Tom, your books should be in right order.
— OK. I'll _____ right now. [ ]
A. put them down
B. put them away
C. put them up
D. put them on
足月儿的血压约为（）
A.40/20mmHg
B.50/30mmHg
C.60/40mmHg
D.70/50mmHg
E.80/60mmHg
