为了保证捻合后的股线品质优良，在捻线之前先经过（）.
参考答案：并线
9. Great changes ______ in our school in the past 5 years.
A．took place
B．were taken place
C．have taken place
D．have been taken place
晓钢，男，12岁，白血病，化疗过程中因口腔溃疡需做咽拭子真菌培养，采集标本部位为
A．咽部B．扁桃体C．双侧腭弓D．溃疡面E．舌面
