问题
单项选择题
离心泵启动前（），是为了防止气缚现象发生。
A.灌水；
B.放气；
C.灌油；
D.灌泵。
答案
参考答案：D
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离心泵启动前（），是为了防止气缚现象发生。
A.灌水；
B.放气；
C.灌油；
D.灌泵。
参考答案：D
| 用方框中所给单饲的适当形式完成短文。 | |
from February l2th to 28th , 2010. A young girl 2._____Zhou Yang of 3._____ 1500 meters short-track speed(短道速滑)skating team 4._____part in the Olympics. It 5._____her first winter Olympic experience. But she 6._____the gold medal in 1500 meters short-track；speed skating on February 20. People is made 7._____Zhou Yang by her wonderful performance on the international stage in recent years, winning the silver(银)and bronze(铜)medals in the2008 and 2009 world championships respectively. In the past two seasons, she 8._____the top seat in world rankings for the women's 1500 short track. Zhou Yang who 9._____in 1991, comes from Changchun. When she 10._____ after the match, she was very excited ,and she hoped she would provide better lit for her parents,because her mother isn't very healthy. Let's wish her better future! |