【简答题】引下线宜采用________或________,宜优先采用________。
【简答题】引下线宜采用圆钢或扁钢,宜优先采用圆钢。圆钢直径不应小于()。扁钢截面不应小于(),其厚度不应小于()。
【简答题】What do American students try to do in class? They try to ______ in working out problems by themselves.
【单选题】—I'd like to do somle volunteer work, but I'm not sure what I should do. —You ______ give out food at the food bank. [ ]
【简答题】How do the Wertmans work out their problems?
【简答题】引下线宜采用()或(),宜优先采用()。
【简答题】引下线宜采用圆钢或扁钢,宜优先采用()。
【单选题】--Do you hear a fire ___ last night?---Yes, it __ by the firemen in no time.
A.
broke out, was put out
B.
was broken out, was put out
C.
went out ; was put out
【判断题】引下线宜采用圆钢或扁钢,宜优先采用圆钢,圆钢直径不应小于10mm。扁,截面不应小于48mm 2 ,其厚度不应小于4mm。