What’s the best title forthis passage？
A. Nevershake hands with Asian people
B. Differentculture，differentcustom
C. Smileas much as you can
D. Peoplebehave rudely in foreign countries
查看答案
A.removedB.repairedC.destroyedD.replaced
A. removed
B. repaired
C. destroyed
D. replaced
According to Schwartz, what can help people know more about climate change？
A. Taking a course on phenology.
B. Knowledge of life cycle events of plants and animals.
C. Efforts of ecologists to learn more about plant flowering.
D. Full support of citizen scientists to study climate changes.
A．smart B．wrong C．free D．difficult
铸造中用得最普遍的金属为（）。
A. 铸钢
B. 灰El铸铁
C. 钴镍合金
D. 铅锡合金
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