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【单选题】
已知a，b，c，d是空间四条直线，如果a⊥c，b⊥c，a⊥d，b⊥d，那么 [ ]A.
a∥b且c∥d
B.
a，b，c，d中任意两条可能都不平行
C.
a∥b或c∥d
D.
a，b，c，d中至多有一对直线互相平行
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举一反三
【单选题】All of the following are measures of GDP except the total:
A.
expenditures of all businesses in the economy.
B.
income from all final production in the economy.
C.
expenditures on all final goods and services produced.
D.
value of all final production.
【简答题】Shipowner will be responsible for all the vessel operation and crew employment for bareboat chartering．（ ）
【简答题】假设一道排序题共有A、B、C、D这4个选项，总共有8人参与了排序。其中A选项被排在第一位置2次、第二位置3次、第三位置1次、第四位置2次，那么A选项在问卷星中的得分为___________。
【单选题】根据《医疗事故处理条例》的规定,下列情况中属于二级医疗事故的是
A.
轻度残疾或者器官组织损伤导致一般功能障碍
B.
轻度残疾或者器官组织损伤导致严重功能障碍
C.
中度残疾或者器官组织损伤导致一般功能障碍
D.
中度残疾或者器官组织损伤导致严重功能障碍
E.
造成明显人身损害的其他后果
【单选题】All the following choices about GDP deflator are ture , except the one choice( ).
A.
GDP deflator equal the an average of the current prices of all the goods and services included in GDP expressed as a percentage of base-year prices.
B.
GDP deflator uses all the products in GDP(exports consumption investment government buying), CPI only uses the prices of consumption.
C.
GDP deflator weights each item using quantity information of current and past, it includes new goods, quality improvement and substitution goods. CPI not.
D.
GDP deflator uses all the consumption products in GDP and CPI only uses the prices of consumption.
【单选题】All liabilities in connection ______ the said damage ______ from the accident are to be for ship-owner's account．
A.
to／rising
B.
with／arising
C.
to／arising
D.
with／arised
相关题目：
【简答题】假设一道排序题共有A、B、C、D这4个选项，总共有8人参与了排序。其中A选项被排在第一位置2次、第二位置3次、第三位置1次、第四位置2次，那么A选项在问卷星中的得分为___________。