瓦斯爆炸同时具备三个条件之一：一定温度的火源，其引火温度为（_爱下问搜题

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问题单项选择题

瓦斯爆炸同时具备三个条件之一：一定温度的火源，其引火温度为（）。

A.450％-550％

B.550-650

C.650％-750％

答案

参考答案：C

填空题

Questions 9-13

·You will hear a passage about "Surviving Cultural Shock".
·For questions 9-13, choose from the list A-F the five stages of cultural shock.
·Use the letters only once. There is one extra letter, which you do not need to use.
9. Stage 1 ______
10. Stage 2 ______
11. Stage 3 ______
12. Stage 4 ______
13. Stage 5 ______

A. The Re-entry
B. The Rejection
C. The Acceptance
D. The Honeymoon
E. The Regression
F. The Non-Party

问答题简答题

三焦如何主持诸气，总司人体气化的？