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【单选题】
焊接结构的使用条件是多种多样的，当构件在低温下工作或冲击载荷下工作时，容易发生( )。A.
蠕变
B.
腐蚀性破坏
C.
脆性破坏
D.
塑性破坏
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【简答题】Please finish the following 10 blanks. In Kenya today, 1______ percent of all girls go to 2_______ school. But in poor areas, only 3_______ girls goes to school. Forty-eight percent of Kenya’s girls g...
【简答题】Listen to the recording and fill in the blanks. In Kenya today, (1)___________ percent of all girls go to (2)____________ school. But in poor areas, only one in (3)____________ girls goes to school. (...
【单选题】Which is NOT one of the reasons why city life is not preferable?
A.
The people are not in regular communication with the rhythm of nature.
B.
The people can't enjoy sunshine and fresh air.
C.
Modern cities offer better schools, more chances of employment.
D.
Traffic fumes pollute the air.
【简答题】In Kenya today, 1 percent of all girls go to 2 school. But in poor areas, only one in five girls goes to school. Forty-eight percent of Kenya ’s girls go to high school. In poor areas only about eleve...
【单选题】Which of the following is NOT one of the effects of multivitamins mentioned in the passage?
A.
To reduce the rate of babies born too early.
B.
To reduce the risk of low birth weight.
C.
To reduce fetal deaths in pregnant women infected with HIV.
D.
To increase the number of lymphocytes in mothers’ blood.
【简答题】三极管根据内部结构的不同可分为 _________ 型和 __ _ _ __ 型两类。
【简答题】简述设施降温措施有哪些？
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