对高速钢的主要性能要求是高的()、高的()、高的()和()。
参考答案:硬度、韧性、耐磨性、红硬性
填入适当的词补全对话,每空一词。
A: Are you ready 1 the trip to the Silk Road?
B: Almost. I packed a camera and a 2 of new sandals( 凉鞋).
A: Did you read books 3 the Silk Road?
B: Do you think I should 4 some books?
A: Yes. It will help you understand more about the Silk Road.
B: I see, but I only have two days to read.
A: Don't worry. You 5 have to finish it.
1.______ 2.______ 3.______ 4.______ 5.______
Only after reaching eighteen join the army.
A.have you; you can
B.have you; can you
C.you have; you can
D.you have; can you