铅模水眼小容易堵塞,钻具应清洁无氧化铁屑。为防止堵塞,可下钻()后洗井一次。
A、50~100m
B、100~200m
C、200~300m
D、300~400m
参考答案:D
-Would your brother go for a picnic this Sunday7
-If I don't go,____.
A.so does he
B.so he will
C.neither will he
D.neither does he
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