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【判断题】
“固定”约束是将元件固定在装配环境中的默认坐标系上。A.
正确
B.
错误
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举一反三
【单选题】What is the proposal drawn by an international panel?
A.
The expansion of the UN Security Council from 16 to 24.
B.
The Security Council should be more proactive in authorizing the use of force.
C.
Adding seven new permanent members in the UN Security Council.
D.
States cannot use force preemptively.
【简答题】某化妆品厂为增值税一般纳税人, 2019年9月发生如下经济业务: 销售一批高档化妆品,使用消费税税率 15%,开出增值税专用发票,收取价款200万元,货款已存入银行。
【简答题】完形填空。 I'm Mary. I'm from England. __ 1 __ now, I'm in Shanghai. I have a new friend. __ 2 __ is a Chinese girl and her __ 3 __ is Liu Ying. We are both in Class 2, Grade 7. We are __ 4 __ . Liu Ying ...
【单选题】According to the passage, which of the following statements about retired people in the United States is tree?
A.
Many of them have a very hard life.
B.
They cannot live a decent life without enough bank savings.
C.
They rely mainly on their children for financial support.
D.
Most of them live with their children and therefore are well looked after.
【单选题】关于乙烯,下列说法不正确的是( )。
A.
乙烯分子为平面结构
B.
乙烯能使酸性高锰酸钾溶液和溴水 褪色
C.
乙烯属于饱和烃
D.
乙烯可以作为植物生长调节剂，具有催熟作用
【简答题】Two worlds come together Imagine landing in a foreign country where you cannot speak the language, understand the culture and don’t know anybody. Wouldn’t it be nice to have a friend who could help yo...
【判断题】有一个反映大学毕业生收入情况的包含40个学生的样本。样本均值为4000元,样本标准差为1000元。需要用t分布来构建大学生总体平均收入的置信区间。
A.
正确
B.
错误
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