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【简答题】
在编写程序过程中,如果希望一个字符串的内容全部是英文字母,若其中包含其他的字符,则抛出一个异常。因为在 Java 内置的异常类中不存在描述该情况的异常,则需要自定义该异常类。(直接复制代码在答案区) 例如: str1="HellWorld"; str2="Hell!MR!"; 结果: HellWorld 字符串 "Hell!MR!" 中含有非法字符 ! 参考exam04,
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【单选题】在12月31日那天晚上到宾馆或饭店去庆贺对美国人来说已经越来越普遍。
A.
It has become more and more common for Americans to go to a hotel or restaurant.
B.
It has become more and more common to go to a hotel or restaurant.
C.
It has become common for Americans to go to a hotel or restaurant on the night of December 31st.
D.
It has become more and more common for Americans to go to a hotel or restaurant on the night of December 31st.
【单选题】The government decides to impose a price ceiling on a good, because it thinks the market-determined price is “too high.” If the government imposes the price ceiling below the equilibrium price:
A.
. consumers will respond to the lower price and therefore wish to purchase more of the good than at the equilibrium price.
B.
. producers will respond to the lower price and therefore offer more units for sale.
C.
. consumers will be able to purchase more of the good after the price ceiling is imposed.
D.
. it will not be binding.
【简答题】简述檩条的荷载和荷载组合,并说明如何对檩条进行截面选择?
【单选题】It has been predicted that nanomaterials will become the most materials in the 21st century.
A.
potential
B.
expensive
C.
cheap
D.
controversial
【简答题】测定配合力的方法有哪些？
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