大水泡音多出现在下列哪个时期
A．吸气早期
B．吸气中期
C．吸气晚期
D．呼气中期
E．呼气晚期
参考答案：A
— Did you have any classes last Friday?
— No, we had a party _____ having class. [ ]
A. instead
B. instead of
C. but
D. still
胎盘部位滋养细胞肿瘤行化疗效佳。()
