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【判断题】
消耗臭氧层的物质有氟氯烷烃、哈龙、CO、甲烷等。A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】通常当变压器负荷率不大于85%时，其无功功率损耗可概略估算为______kvar。
A.
ΔQT≈(0.25～0.3)Sjs
B.
ΔQT≈(0.2～0.25)Sjs
C.
ΔQT≈(0.15～0.2)Sjs
D.
ΔQT≈(0.05～0.08)Sjs
【简答题】土壤具有______是土壤不同于其他自然物质最本质的特征。
【单选题】通常当变压器负荷率不大于85％时，其无功功率损耗可概略估算为( )。
A.
△QT≈(0．25～0．3)Sjs(kvat)
B.
△QT≈(0．2～0．25)Sjs(kvar)
C.
△QT≈(0．15～0．2)Sjs(kvar)
D.
△QT≈(0．05～0．08)Sjs(kvar)
【简答题】土壤具有( )是土壤最本质的特征 A肥力 B有机质 C矿物质 D水分
【单选题】There are many different kinds of tasks for students to do while they are listening to a passage. Which of the following is NOT while-listening activities?
A.
Listen and sequence.
B.
Listen and draw.
C.
Listening for specific information
D.
No specific responses.
【简答题】How many tasks are there in the IELTS Academic Writing test?
【单选题】There are many different kinds of tasks for students to do while they are listening to a passage. Which of the following is NOT while-listening activities?
A.
Listen and sequence.
B.
Listen and draw.
C.
Listening for specific information
D.
Listen and take notes
【简答题】土壤具有______是土壤不同于其他自然物质最本质的特征。
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