29. The writer thinks that people in large cities should __________ .
A. stop the used water from getting into underground
B. only use the water from the rivers
C. make their used water clean again
D. use as much sea water as possible
第1题:
________ the vessel have no safety radiotelegraphy certificate at the time of her delivery,she ________ be held to be unseaworthy.
A.If/may
B.Will/shall
C.Should/would
D.Would/should
第2题:
第3题:
第4题:
______ it rain tomorrow moring, the loading ______.
A.Should / will be postponed
B.If / shall be postponed
C.Should / would be postponed
D.If / has to be postponed
第5题:
第6题:
如下哪种描述是正确的?
A.Writer类可以使用不同的字符集编码向输出流写入字符。
B.Writer类可以向输出流写入unicode字符。
C.Writer类提供向输出流写入任何Java基本数据类型的方法。
D.Writer类提供向输出流写入对象类型数据的方法。