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【判断题】
E5016(J506)和E5015(J507)焊条不同之处,是前者含钾较多,正因为如此,两种焊条在同样条件下焊接,E5016(J506)焊条比E5015(J507)焊条容易出氢气孔。( )
A.
正确
B.
错误
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举一反三
【单选题】I do _____ homework at half past seve n.
A.
   I
B.
   me
C.
   my
【单选题】My grandfather, a retired worker, often __________ the past with a feeling of longing and respect.
A.
considers
B.
contemplates
C.
contrives
D.
contacts
【判断题】检测 A 、 B 、 C 三个小麦品种子粒蛋白质含量,每一品种随机抽取 10 株,每株子粒蛋白质检测 3 次,这类试验资料属于单因素随机区组试验资料。
A.
正确
B.
错误
【单选题】In the past, there was _______library ______hospital in my hometown.
A.
no, and
B.
no, or
C.
not, and
D.
not, or
【判断题】检测 A 、 B 、 C 三个小麦品种子粒蛋白质含量,每一品种随机抽取 10 株,每株子粒蛋白质检测 3 次,这类试验资料属于单因素随机区组试验资料。
A.
正确
B.
错误
【单选题】No one has come up with a better explanation of why dinosaurs __________. [     ]
A.
died away
B.
died for
C.
died of
D.
died out
【简答题】How old was Miss Emily when she died?
【单选题】When he walks _____ my desk, he often knocks my books ______ the desk.
A.
pass; off
B.
past; off
C.
pass; on
D.
past; on
【单选题】My surprise over the past few winters has been the personality transformation my parents go through around mid-December as they change from Dad and Mom into Grandpa and Grandma. Yes, they become grand...
A.
feels jealous
B.
feels amazed
C.
thinks it unnecessary
D.
thinks it annoying
【简答题】红枣包装中常使用一种袋装防腐剂,它是一种双吸剂,该双吸剂的成分为铁粉、生石灰等.某兴趣小组同学对一包久置的双吸剂固体样品很好奇,设计实验进行好下探究. 【提出问题】久置固体的成分是什么? 【查阅资料】铁与氯化铁溶液在常温下发生反应生成氯化亚铁. 【提出猜想】久置固体中可能含有Fe、Fe 2 O 3 、、Ca(OH) 2 和______. 【方案探究】 方案一: 实验操作 实验现象 实验结论 ...
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