妊娠60天时终止妊娠，可选用( )
A．钳刮术B．负压吸宫术C．利凡诺羊膜腔内注射D．水囊引产E．静脉滴注催产素
参考答案：B
______ answer the teacher's question on this modal verb? [ ]
A. Do you think how can we
B. Do you think how we can
C. How do you think we can
D. How do you think can we
A．电流表的示数为3/11 A
B．通过灯泡的电流的频率为50Hz
C．电流表的示数为3/22 A
D．理想变压器原、副线圈匝数之比为2:1
sin100πt （V）的 正弦交流电源，图中电流表内阻不计．副线圈接入“110V，60W”灯泡一只，且灯光正常发光．下列说法正确的是（ ）
/22 A