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【单选题】
如图是元素周期表中的有关铈元素的信息．下列从图中获得的有关信息错误的是（ ）A.
铈的元素符号是Ce
B.
铈的相对原子质量是140.1
C.
铈的原子序数为58
D.
铈元素是非金属元素
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【简答题】Last week, while visiting my dad with my daughter, we went to a restaurant for dinner. When we were seated, my dad asked the waitress if there were any soldiers eating at the restaurant. Then waitress...
【单选题】People often recall having felt chilled before the onset of a cold. This supports the hypothesis that colds are, at least sometimes, caused by becoming chilled; it is the chill that allows a rhino vir...
A.
Being chilled is a form. of stress, and stress lowers the defenses of a person' s immune system, which guards against infection.
B.
After a rhino virus has incubated in a person for several days, the first symptom it causes is a feeling of chilliness.
C.
People who are tired and then become chilled are more likely to catch severe colds than are people who are chilled without being tired.
D.
Some people who catch colds are not sure what it was that allowed them to catch cold.
E.
Rhino viruses are not always present in the environment, and so a person could become chilled without catching a cold.
【单选题】We ______ them not to go skating on such thin ice.
A.
reply
B.
remind
C.
warn
D.
recall
【简答题】We often recall Dad’s __________ (tell) us not to jump too hard and too high.
【简答题】将下面的程序补充完整,实现任意范围累加求和
【简答题】(B) Last week, while visiting my dad with my daughter, we went to a restaurant for dinner. When we were seated, my dad asked the waitress if there were any soldiers eating at the restaurant. Then wait...
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