门窗框和厚度大于()的门窗扇应用双榫连接。榫槽应采用胶料严密嵌合,并应用胶楔加紧。
A.40mm
B.45mm
C.50mm
D.55mm
参考答案:C
WHO在1984年以后防治血吸虫病的目标是()。
A.控制传播
B.阻断传播
C.发病控制
D.基本消灭
E.消灭
We’ve just moved into a bigger house and there’s a lot to do. Let’s _________ it.
A.keep up with
B.do away with
C.get down to
D.look forward to