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【单选题】
当线程调用 start()后,其所处状态为( )A.
A．阻塞状态
B.
运行状态
C.
C、就绪状态
D.
D、新建状态
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【单选题】Lead deposits, which accumulated in soil and snow during the 1960's and 1970's, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Cl...
A.
lead deposits in arctic snow are on the increase
B.
the Clean Air Act has not produced the desired results
C.
the US is the major source of lead pollution in arctic snow
D.
lead will stay in soil and snow longer than expected
【单选题】根据下面材料，回答题。 Lead Pollution (铅污染) Lead deposits, which accumulated in soil and snow during the 1960&39;s and 70&39;s, were primarily the result of leaded gasoline emissions originating in the United St...
A.
the US is the major source of lead pollution in arctic snow
B.
the Clean Air Act has not produced the desired results
C.
lead will stay in soil and snow longer than expected
D.
lead deposits in arctic snow are on the increase
【简答题】基尔霍夫电流定律是（）的具体体现，基尔霍夫电压定律实质上是（）性质的反映。
【多选题】为了使顾客产生对推销商品的兴趣,推销人员可以:
A.
以简练的语言概括推销商品的特点
B.
以适当的示范来增强顾客的实际感受
C.
通过与竞争商品进行比较
D.
采用一些非常规的方法来激发顾客的兴趣
【单选题】It is important that the water _____ very often as this can lead to increased deposits.
A.
not be changed
B.
be changed
C.
should not be changed
D.
should be changed
【判断题】站前折返方式的优点是：折返渡线布置在站台的前方，列车走行距离较长，站线兼作折返线使用，站线布置较短，可以减少建设项目的投资，并且在进行折返作业时，乘客上下车可以同时进行，可以缩短停站时间()
A.
正确
B.
错误
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