肌酸激酶同工酶的种类有（）
A.2种
B.3种
C.4种
D.5种
E.6种
参考答案：B
— What is he doing?
— __________________[ ]
A. She is reaching.
B. He is jumping.
C. They're smiling.
产妇，28岁，孕1产0，宫口已开全。 * * 检查：胎头矢状缝与骨盆横径一致，小囟门在1点处，大囟门在7点，为何种胎方位()
A．LOA
B．ROT
C．LOT
D．ROA
E．LOP
