对低塌达到轻伤的焊接接头,每()至少检查1遍。
参考答案:季度
We always keep ____ spare paper, in case we run out. [ ]
A. too much
B. a number of
C. plenty of
D. a good many
* * 内有大量泡沫样白带最常见于
A.慢性宫颈炎
B.滴虫性 * * 炎
C.老年性 * * 炎
D.念珠菌性 * * 炎
E.慢性盆腔炎