包壳鼓胀 cladding ballooning
参考答案:
事故时,燃料元件包壳内压力和包壳温度过高,是包壳所受应力超过它的弹性极限而引起包壳出现鼓包的现象。
阅读对话,并补全所缺单词。
Betty: Daming, w__1__ you like to go to the zoo with me?
Daming: That's great! What's your f__2__ animal?
Betty: Well, I like giraffes best. Their __3__ are really long and beautiful. How about you?
Daming: Koalas (树袋熊) are my favourite a__4__.
Betty: Why do you like them?
Daming: Because they are cute(可爱的)and shy. They live in the tree and only eat l__5__.
Betty: Do you k__6__ where the koalas are from?
Daming: Yes, I do. They are from Australia, the s__7__ as kangaroos.
Betty: I like kangaroos, too. I want to go to Australia and see the kangaroos.
Daming: There are kangaroos in our City Z__8__. Let's go and see them.
Betty: Good. Let's go!
把建设新中国的战略目标确定为“由农业国变为工业国,实现国家工业化”的中共的重要会议包括
①中共“七大” ②中共七届二中全会 ③中国人民政治协商会议④中共“八大”
A.②④
B.③
C.①②④
D.①②③④